Eachnight may earn commissions for products you purchase through our links. Our articles and reviews include affiliate links and advertisements, including amerisleep advertising. Learn more Updated January 5, 2024Are you and your spouse feeling crowded or uncomfortable during the night? Do your kids frequently climb into bed with you and force you to the edge of the mattress? If so, it may be time to upgrade to the best king size mattress you can find. May couples start with a queen size bed, but over time, this size can start to feel inadequate and upgrade to one of the best king size mattresses on the market.A king mattress will give both you and your spouse (and your children) plenty of room to stretch out and sleep comfortably. This article will take a took at 8 of the best king size mattresses on the market. Plus, we’ve included a comprehensive buyer’s guide to make shopping for your new king mattresses less complicated. Why Trust Us Our dedicated team of sleep science coaches, engineers, and product evaluators thoroughly investigate hundreds of mattresses using our unique product methodology. Each article is reviewed for accuracy, referencing only trustworthy sources. Consistently updating our content and picks, we align with the latest scientific literature and expert counsel. Our top-rated mattresses have been personally reviewed and highly rated. When it comes to finding the perfect king-size mattress, we strive to offer the most informed and user-tested brands for you. We consult with medical experts and delve into the latest and most innovative research in sleep science to understand what truly makes the best king size mattress exceptional in terms of comfort and support. But we don’t stop there. Real-world experiences matter, so we also reach out to our extensive network of testers, comprising over 17,000 mattress owners.Our most recent survey takes a deep dive into the thoughts of real people about their mattresses. We carefully analyze feedback from thousands of users, searching for patterns in preferences, standout features, and any common issues. We pay close attention to details like how well the mattresses hold up over time, the level of support they provide, and overall comfort.Our aim? To provide you with the complete picture with not just the stats and specifications of each king mattress, but actual user experiences, enabling you to choose a king-size mattress that suits you perfectly. We sift through the data, consider the pros and cons, and are here to share our findings. Our recommendations are based on thorough research and authentic user feedback. If you’re shopping for a new mattress that suits your specific needs, our guide is crafted to assist you in making an informed, confident decision that caters to you.Best King Size Mattress for Adults Summary Best King Size Mattress Overall: Amerisleep AS3 Best Memory Foam King Size Mattress: Zoma Start Best Budget King Size Mattress: Vaya Mattress Best Cooling King Size Mattress: Nolah Evolution 15 Best Soft King Size Mattress: Amerisleep AS5 Hybrid Best King Size Mattress for Side Sleepers: GhostBed Luxe Best Innerspring King Size Mattress: Saatva Classic Best Latex King Size Mattress: Avocado Green Mattress Best Hybrid King Size Mattress: Zoma Boost Best King Size Mattress for Athletes: Bear Pro Best Luxury King Size Mattress: Purple Hybrid Premier 3 Best King Size Mattress for Shoulder/Hip Pain: Helix Midnight Luxe Best King Size Mattress Overall: Amerisleep AS3 Your browser does not support HTML5 video. Price: $1149-$2398Mattress Type: Memory FoamMattress Height: 12 inchesFirmness: Medium (5 on the firmness scale)Best for most couples, side sleepers, combo sleepers, and petite sleepersAvailable in twin, twin XL, full (double), queen, king, California king, and split king Warranty 20 Years Sleep Trial 100 Nights Shipping FreeRecommended ForCouplesSide sleepersCombination sleepersPetite sleepersMattress HighlightsBio-Pur® has plant-based oils in its production for less off-gassingAffinity layer features cutouts for extra cushioning and supportPlant-based memory foam is highly durable and breathableSave $450 on the Amerisleep AS3 with our discount code. Claim Deal Amerisleep offers five different memory foam mattresses, each with a different firmness. Their AS3 model is our recommendation because the medium firmness is ideal for couples and most sleeping positions. Plus, it comes with a unique transition layer that provides the perfect balance of cushioning and support.Compared to other Amerisleep mattresses, the AS3 offers a balanced feel meant to suit a wide range of sleepers. To ensure your comfort and satisfaction, the AS3 comes with a 100-night sleep trial and a 20-year warranty.How Lying Down FeelsAmerisleep’s proprietary foam, Bio-Pur®, makes up the top layer of the AS3 and provides plush comfort that contours to the body. Traditional memory foam tends to trap heat and can also give off a harsh chemical smell.Thanks to how well the Bio-Pur® conforms under the body, reviewers say how they almost never notice their partner shifting or getting out of bed at night. An extremely helpful feature when looking for the best king size mattress meant for two to share.What Testers ThinkIn line with the meticulous standards of the esteemed sleep science community, here are some objective tester notes on the Amerisleep AS3 12″ Memory Foam Mattress. Leveraging our expertise in evaluating mattresses for back pain relief, we surveyed thousands of testers on their real user experiences to guide potential buyers. These tester notes offer valuable insights into the comfort, health benefits, and overall satisfaction derived from the Amerisleep AS3 model. Our professional opinions aim to empower consumers in making informed decisions when selecting a mattress tailored to their needs.Bill – Nogales, AZ Bill shares his experience with the King Amerisleep AS3 12″ Memory Foam Mattress model. While managing severe allergies from dust mites, Bill reports a significant improvement in his sleep quality and increased energy levels after his trial period reviewing this mattress. Melissa – Henrietta, NY Melissa expresses her satisfaction with the Amerisleep AS3 12″ Memory Foam Mattress, highlighting the AS3 as the bed model she tested. Dealing with fibromyalgia, Melissa notes that she usually experiences hip pain in the morning but has found relief with this mattress. She dispels concerns about the mattress sleeping “hot” and enthusiastically recommends it based on her positive experience. WLP – Ft Worth, Texas WLP also helped provide insights into the Amerisleep AS3 12″ Memory Foam Mattress. Expressing a preference for the Colonial bed, WLP opted for the AS3 bed due to its availability in a split king size mattress, aligning with future plans to purchase an adjustable frame. While noting that the mattress is slightly firmer than anticipated, WLP overall finds it to be a comfortable choice with no noticeable movement when rolling over. Inside the Mattress Amerisleep’s Bio-Pur® foam offers more breathability, plus it is cleaner and less toxic than most memory foams. The CertiPUR-US® certification ensures little to no “off-gassing” when you bring the mattress home. Amerisleep creates this foam by substituting plant-based oils with some of the petroleum-based oils. This unique memory foam provides a more comfortable and safer sleep surface.Beneath this foam is a transition layer featuring HIVE® technology. This layer is zoned to provide a deeper compression near the hips and shoulders, and more firmness under the back, neck, and head. HIVE® is also responsive enough to prevent excessive sinking, so the spine always remains in a neutral position.Supporting these advanced layers is Amerisleep’s Bio-Core® base foam. This durable foam prevents sagging and indentations, so your new bed will support you for years to come.See Also: Best Mattress for Hip PainPros Hypoallergenic for those sensitive to allergies Made for increased recovery Good for pain reductionCons Some feel the mattress is too hard for their liking What the testers say: “I tested the AS3 in my preferred back and side sleeping positions. My spine stayed properly aligned with no sinking around the hips. There was great edge support and sturdy stability across the entire mattress.” – Dr. Colleen Ehrnstrom, Ph.D., AS3 Reviewer Read Our Full Review of the Amerisleep AS3 Mattress Best memory Foam King Size Mattress: Zoma Start Your browser does not support HTML5 video. Price: $449 to $898Mattress Type: Memory FoamMattress Height: 10 inchesFirmness:Medium to Medium-firm (6 to 7 on the firmness scale)Best for hot sleepers who snore, most sleep stylesAvailable in twin, twin XL, full (double), queen, king, California king, and split king Warranty 10 Years Sleep Trial 100 Nights Shipping FreeRecommended ForBudget shoppers and bargain huntersMost types of sleeping positions and body typesHot sleepersCouplesMattress HighlightsConforming gel memory foam cradles the body without feeling overly softThick base foam layer promotes a durable structure for years of nightly useBuoyant transition layer adds latex-like responsivenessSave $150 on the Zoma Start with our discount code. Claim Deal Next on our list is the Zoma Start Mattress, a memory foam mattress for athletes who are looking for the best king size mattresses. We like the Zoma to silence snoring because it’s built with Triangulex™ technology to promote healthy sleeping positions.The Zoma Mattress stands 11 inches tall and has three carefully-crafted layers. While the Zoma is built to feel medium, some reviews mention it feels medium-soft; so it’s on the softer side of the firmness scale.Every Zoma mattress comes with a 100-night sleep trial and a 10-year warranty.How Lying Down FeelsLying down on the Zoma Start, the first thing you’ll notice is that it is highly responsive for an all-foam mattress. This is all thanks to the layer of bouncy Reactiv™ transition foam that springs back as soon as you move and offers dynamic support.This medium mattress also offers tons of versatility for all kinds of sleepers. It is on the more supportive end of a medium feel. So it can accommodate some back sleepers and virtually all combo sleepers at once. This is perfect for combo sleepers who tend to favor their backs. It also is a good fit for those who suffer from back pain.What Testers ThinkKristin – Olympia, WA After a comprehensive six-month evaluation, it’s apparent that the Zoma mattress requires a notable adjustment period. The bed, commendably delivered compressed, boasts sturdy construction and customizable height options. However, while its breathability is noteworthy, the integration of an external mattress protector cover tends to make the bed warmer. Despite minor concerns, the Zoma mattress proves comfortable and supportive, making it a suitable choice.Hsiao W. – Flushing, NY With foam mattresses, the Zoma stands out for its commendable attributes. Notably, the absence of fiberglass, addressing a potential health hazard in aging mattresses, distinguishes it positively. The mattress quickly inflates with minimal off-gassing, offering a firm and comfortable feel. While competitively priced, the Zoma mattress provides a safer alternative without compromising on quality, making it a prudent choice for those mindful of health considerations.Rebecca C. – Gaithersburg, MD Addressing specific health concerns, the Zoma mattress emerges as a reliable solution. Particularly beneficial for those seeking relief from back pain, this mattress has demonstrated effectiveness, as reported by a nurse with persistent lower back issues. The mattress’s impact on pain reduction and improved energy levels adds to its appeal. With a proven track record in aiding athletic recovery, the Zoma mattress comes highly recommended, providing potential buyers with a viable option for enhanced sleep quality and physical well-being.Inside the MattressThe Zoma Start starts off with a cooling, ventilated cover that breathes all night to wick away heat and sweat. This cover works with the gel memory foam comfort layer to ensure your sleep surface stays cool all night. The gel memory foam also offers a high degree of compression and pressure relief to ensure you get the contouring you need.Underneath the comfort layer, you’ll find a bouncy transition layer made of Reactiv™ foam. This layer offers buoyancy and dynamic support. It also springs back as soon as you move to ensure that the sleep surface does not have issues with body impressions or slow response time.Finally, a layer of highly durable base foam ensures there is no sinkage in this mattress. It keeps you lifted onto the sleep surface and provides total spinal alignment. Best of all, this base foam layer increases the durability of the entire mattress.You can expect it to fight sagging and soft spot development for at least 10 years. That means it will last just as long as many more expensive mattresses.Pros Comprehensive evaluation period Sturdy construction Recommended by medical professionalsCons No natural materials, which can cause some sleepers irritation What the testers say: “When I lay down, I felt a clear sense of contouring and cushioned comfort, all while maintaining good support. The foams seemed to adjust to my body shape, offering relief from pressure while keeping my spine aligned. While the bed could feel firm, I woke up with no aches and pains nor did I ever experience major stiffness and soreness from lying down.” – Dr. Nilong Vyas MD, MPH, Zoma Start Reviewer Read Our Full Review of the Zoma Start Mattress Best Budget King Size Mattress: Vaya Mattress Your browser does not support HTML5 video. Price: $349-$799Mattress Type: Memory foamMattress Height: 12 inchesFirmness: Medium (5 on the firmness scale)Best for all sleep positions and body types, couples, and allergy sufferersAvailable in twin, twin XL, full (double), queen, king, California king, and split king Warranty 10 Years Sleep Trial 100 Nights Shipping FreeRecommended ForAll types of sleeping positionsVarious body typesCouplesAllergy sufferersMattress HighlightsHypoallergenic design won’t aggravate sleepers with sensitivitiesAiry cover fabric with light, responsive and breathable foamSupportive base keeps the bed standing strong with useSave $300 on the Vaya Mattress with our discount code. Claim Deal The Vaya Mattress features two hypoallergenic foam layers ideal for allergy sufferers searching for the best king size mattress for their needs. Vaya foam also offers a slight bounce similar to latex foam. This responsiveness provides a balance of support and lift.Vaya manages to offer such affordable beds by streamlining their design. Their two mattresses—the flagship Vaya Mattress and Vaya Hybrid—have simple constructions with high-quality materials. The beds use similar materials, but the Vaya Hybrid has a pocketed coil base.Vaya offers a 100-night sleep trial and a 10-year warranty.How Lying Down FeelsAs we said earlier, despite the thick top of the Vaya Mattress, it doesn’t feel overly plush and is quick to adapt to movements. Customers, too, note how well the bed supports their bodies while still feeling soft and cushiony. If you want to feel hugged and cradled by your mattress, choose the Vaya Mattress.What Testers ThinkJoan C. – USA The positive domino effect within my friend’s family attests to the mattress’s appeal. My son, after two weeks of use, tested this mattress experiencing restful sleep. The king Vaya mattress has proven to be a worthwhile mattress, demonstrating consistent satisfaction.Cooper – USA A seasoned professional working with animals, I found a transformative solution in the Vaya mattress. Having endured back pain for decades due to the physical demands of my job, even a high-end mattress failed to alleviate the discomfort. The Vaya mattress, however, not only facilitated uninterrupted sleep but also eliminated back pain entirely. Beyond its therapeutic benefits, the mattress’s temperature neutrality and ease of handling upon delivery contribute to an overwhelmingly positive experience. This product is unequivocally recommended for those seeking respite from chronic back issues.Karen P. – USA In assessing the Vaya mattress, its construction and hybrid design stand out positively. However, a notable concern emerges regarding its firmness, leading to discomfort for the user. Despite the mattress’s quality and hybrid features, the issue persists, causing discomfort in the hips. A commendable effort is made during the trial period to acclimate to the mattress, but the prospect of returning it becomes a consideration due to persistent discomfort.Inside the MattressWith its soft, breathable cover, body heat is circulated away from the bed to prevent overheating. Soft foam in the comfort layer offers more breathability and hugs the body for pressure-free support. The support foam in the base of the mattress is a higher density foam to keep the bed even and prevent sagging.Both foam layers have a CertiPUR-US® certification to ensure a low VOC emission. Plus, the Vaya Mattress pairs well with most of the best king size mattress bed frames, including slatted frames, box springs, and adjustable bases.SEE ALSO: Vaya Mattress ReviewPros Great choice for children and adults Excellent support for back pain Vaya Base Foam supports the spine and protects the bed from sagsCons Some report the mattress being too firm Best Cooling King Size Mattress: Nolah Evolution 15 Your browser does not support HTML5 video. Price: $1799 to $2399Mattress Type: HybridMattress Height: 15 inchesFirmness: Plush (5 on the firmness scale), luxury-firm (6 to 7 on the firmness scale), firm (8 on the firmness scale)Best for Available in twin, twin XL, full (double), queen, king, California king Warranty Lifetime Sleep Trial 120 Nights Shipping FreeRecommended ForHot sleepersCouplesMost sleeping positions and body typesMattress HighlightsArcticTex™ cover covers an airy Euro topperAdded savings through removing sleep trialNon-skid base keeps the mattress from slidingSave with Free Shipping on the Nolah Evolution 15 with our discount code. Claim Deal Staying cool at night is one of the most surefire ways to get a full night’s rest. People who don’t take steps with a cooling mattress and bedding are more likely to wake up in the middle of the night with sweaty, sticky skin. This goes double for anyone sharing a bed and dealing with twice the body heat.A mattress like the Nolah Evolution 15 relies on multiple features for a cool-to-the-touch feel. The Nolah Evolution comes with a 120-night sleep trial and a lifetime warranty. The mattress’s home trial can be taken off at check out for extra savings, helpful for anyone who wants to save on a high-quality king size mattress.How Lying Down FeelsThe Nolah Evolution 15 comes in one of different three firmnesses, from a plush feel to a more versatile luxury firm to a truly firm feel. Which of these firmnesses will establish the most comfortable mattress depends on a sleeper’s preferences.The lack of give the firm option offers can feel quite pleasant to stomach or back sleepers, while side sleepers will need the more ready cushion offered by the plush and luxury firm beds.What Testers ThinkRebecca Thompson, USA – The Nolah Luxury Firm mattress impressively aligns with the company’s tailored recommendations for different weight categories. At 190 pounds, I found the cradling softness and supportive firmness of the mattress to be a harmonious blend, effectively alleviating back pain. The mattress accommodates both my 280-pound, 6-foot husband and me (5’10”) comfortably, eliminating his persistent back pain. The overall experience is akin to a refreshing harmony, making it a fitting choice for individuals seeking a well-balanced mattress.James Moyrette – Having tested the Nolah mattress for approximately two weeks, the notable reduction in hip, back, and shoulder pain is a commendable outcome. While the accompanying squish pillows enhance the overall experience, an observed increase in warmth prompts consideration. The mattress cover’s potential impact on heat dissipation warrants further exploration. Nevertheless, the effective motion transfer and the trade-off between warmth and pain reduction contribute to a positive overall assessment, making it a satisfying choice.Anonymous – In evaluating the Nolah mattress, the emphasis on quality and comfort is evident, though the choice of the luxury firm variant may not suit all preferences. Notably, a preference for a firmer option would be preferred, especially for those with a significant weight difference between partners.Inside the MattressThe Nolah Evolution, as a thicker mattress, has quite a lot of materials that contribute to its comfort. The first thing sleepers will notice as they stretch out is the ArcticTex™ cover fabric, with an underlying Euro topper that consists of 2 inches of highly conductive foam.A heat-escape gusset along the mattress’s border completes the bed’s surface focus on staying cool. Underneath the Euro topper is AirFoamICE™, the updated version of Nolah’s original AirFoam™. As the name suggests, it’s been revamped for an even greater focus on cooling comfort.Next is a high-resilence foam for added support, followed by a high-density transition foam to limit sinkage and create a smoother surface feel. The main support core is pocketed coils arranged for responsive support, with foam rails providing edge support and a foundation of recycled plant fibers.SEE ALSO: Nolah Mattress ReviewPros Soft, yet supportive Excellent for pain reduction Balanced firmnessCons Some report firmness issues Best Soft King Size Mattress: Amerisleep AS5 Hybrid Your browser does not support HTML5 video. Price: $1599-$3448Mattress Type: HybridMattress Height: 14 inchesFirmness: Soft (3 on the firmness scale)Best for couples, side sleepers, combo sleepers, and most body typesAvailable in twin, twin XL, full (double), queen, king, California king, and split king Warranty 20 Years Sleep Trial 100 Nights Shipping FreeMattress HighlightsCouplesSide sleepersCombo sleepersMost body types, including petite sleepersRecommended ForBuoyant Active Flex helps maintain surface comfortEdge support makes it easy to move out of bed in the morningThick Bio-Pur® comfort layer has a “cloud-like” feelSave $450 on the Amerisleep AS5 Hybrid with our discount code. Claim Deal In addition to their memory foam mattresses, Amerisleep also offers three hybrid mattresses. If you prefer a soft mattress but also enjoy the slight bounce similar to an innerspring bed, the AS5 Hybrid is a perfect choice.Like all of Amerisleep’s mattresses, the AS5 Hybrid has a 100-night risk free sleep trial and a 20-year warranty.How Lying Down FeelsThough it’s rated as a soft mattress, the AS5 Hybrid is quite capable of feeling strongly supportive. “Good support” is the second most recurring bit of praise in consumer reviews, with only “comfortable” showing up in more reviews.Mattress owners also note that the AS5 holds its shape well, so you don’t have to worry about body impressions lingering on the soft surface. Its responsive feel ensures the cushion snaps quickly back into its original form.What Testers ThinkPro – Tampa, Florida Following an in-depth analysis of the Amerisleep Adjustable Bed+ with both AS3 and AS5 mattresses, the evaluation highlights Amerisleep’s commitment to unparalleled quality in sleep solutions. The AS5, in particular, stands out as a phenomenal choice, outperforming the already outstanding AS3. This comprehensive comparison underscores Amerisleep’s position as a leading provider in the pursuit of optimal sleep experiences, showcasing their dedication to top-tier quality and service.Davis – Florida, US An objective assessment of the Amerisleep AS5 and adjustable base reveals its effectiveness in addressing back pain, especially for individuals with a history of surgery. The bed’s suitability for managing constant pain is noteworthy, emphasizing its potential in enhancing sleep comfort and quality.Jeff the Triathlete – Fishers, IN After a thorough evaluation, the Amerisleep AS5 and adjustable base emerge as an investment for sustained comfort, particularly beneficial for those with a long history of back pain. The AS5, offering a combination of memory foam comfort and adjustable features, proves effective in minimizing low back tightness and pain. While a minor concern is noted regarding potential wear and tear on the sides, strategic mattress maintenance is suggested to address this.Inside the MattressLike the Amerisleep AS3 we mentioned earlier, this mattress features Bio-Pur® foam in the top layer. The exact same amount of Bio-Pur® foam, actually. So how does it feel so much softer? The secret is in its underlying materials.Because soft mattresses tend to sink, Amerisleep includes a layer of Active Flex foam above the spring coils. This layer prevents sinking and quickly reforms to your shape as you move during the night.The Active Flex layer also makes the AS5 Hybrid a usable and comfortable bed for plus-sized sleepers, especially since they usually feel uncomfortable and unsupported on softer mattresses. Not only that, but reviewers note how the extra bounce of the bed makes it easy to switch positions and move in bed.The base of this bed includes a patented spring coil system. These coils are individually wrapped to ensure comfort and prevent pressure points. These coils rest on a foam base to better maintain their support.SEE ALSO: Best Mattress for SeniorsPros Quality customer service Effective at reducing back pain Pocketed coils have firm sides to make sitting on the edges of the better easierCons Softer king mattresses don't suit all sleeping styles What the testers say: “The top layer of the AS5 Hybrid is constructed with Bio-Pur® foam, the same as other Amerisleep memory foam mattresses like the Amerisleep AS2 I tried out previously. This proprietary material is partly plant-based and responsive, contributing to the AS5’s plush and contouring feel. Bio-Pur® memory foam’s eco-friendly composition aligns with Amerisleep’s commitment to sustainability.” – Dr. Jennifer Miller, PT, DPT, AS5 Hybrid Reviewer Read Our Full Review of the Amerisleep AS5 Hybrid Mattress Best King Size Mattress for Side Sleepers: GhostBed Luxe Your browser does not support HTML5 video. Price: $1795 to $3900Mattress Type: Memory FoamMattress Height: 13 InchesFirmness: Medium-plush (5 to 6 on the firmness scale)Best for side-sleeping couples who might sleep hotAvailable in twin, twin XL, full, queen, king, California king, split king Warranty 25 Years Sleep Trial 101 Nights Shipping FreeRecommended ForSide sleepersHot sleepersLightweight people under 230 poundsMattress HighlightsAirflow fibers ensure proper air circulationCooling gel memory foam paired with Ghost Ice materialResponsive, cushioning surface with a plush fabric coverSave with Free Shipping on the GhostBed Luxe with our discount code. Claim Deal Side sleepers should look for softer king size mattresses that can wrap gently around their shoulders and hips, easing pressure that can build up in these areas. Plus, since the mattress has to hug their bodies to fully relieve tension, whens every point of contact can soak up a sleeper’s body heat, cooling features are also essential.When it comes to mattresses for side sleeping that balance soft, pressure-relieving cushion with cooling ability, it’s difficult to find a bed better than the GhostBed Luxe.How Lying Down FeelsThe mildly soft surface of the GhostBed Luxe does more than feel like it’s hugging you, as some sleepers find themselves re-imagining it as a plush, cool cloud that carries you off to sleep, after spending a few nights on its surface.What Testers ThinkBeverley S. – USA In evaluating the GhostBed Luxe, the focus remains on its performance and design attributes rather than its purchasing details. The mattress’s prompt delivery is noted, and its 13″ thickness is highlighted as a notable feature compared to the previous 8″ mattress. Both the ease of setup and the reported improvement in sleep quality, particularly for a user with back and leg medical issues, contribute positively to the overall assessment. Given its suitability for seniors and individuals with specific health considerations, the GhostBed Luxe proves to be a promising option after three weeks of use.Chay S – USA After a month of testing the GhostBed Luxe, its impact on sleep quality is emphasized. Notably, the mattress is lauded for providing comfort and firmness without causing the body to sink in, offering a positive shift in sleep patterns. The endorsement extends to various sleeping positions, making it suitable for side, stomach, and back sleepers. The cooling feature is appreciated, adding to the overall positive experience, and the recommendation to friends and family underscores its potential appeal.Shannon B – USA In the context of professional testing, the GhostBed Luxe is evaluated for setup ease and adaptability. The consolidation of two twins into a king is mentioned, with ongoing adjustments noted in the adaptation to the mattress. Cooling efficiency is reported to be slightly less than suggested, and a subjective assessment of firmness is shared, highlighting the importance of personal preference in mattress selection. The acknowledgment of the return option demonstrates an awareness of individual fit and satisfaction for people who would purchase this mattress.Inside the MattressThe multiple foam layers inside the Ghost Bed Luxe work with the special cover of Ghost Ice, woven for breathability and containing sewn-on cooling airflow fibers.The first foam layer is an inch of gel memory foam, placed to ensure the mattress embraces the sleeper within seconds of lying down. Ghost Ice foam forms the next layer, engineered to take coolness a step beyond what gel memory foam offers. The material swiftly transfers heat away, limiting the build-up that can disturb a good night’s sleep.A thicker layer of gel memory foam is next, for added cooling compression. The two final layers are the transition foam, Ghost Bounce, and the dense base foam that provides the bed’s structural support.SEE ALSO: Best Casper Mattress AlternativesPros Fast and efficient delivery Excellent for back and leg pain Suitable for all sleeping stylesCons Relatively high-priced for a king mattress Best King Size Innerspring Mattress: Saatva Classic Your browser does not support HTML5 video. Price: $887-$2196Mattress Type: InnerspringMattress Height: 11.5 or 14.5 inchesFirmness: Plush soft, luxury firm, or firm (3, 5 to 7, or 8 on the firmness scale)Best for sleepers who enjoy a bouncy innerspring mattressAvailable in twin, twin XL, full (double), queen, king, California king, and split king Warranty Lifetime Sleep Trial 365 Nights Shipping FreeRecommended ForMost sleeping stylesCouplesHot sleepersMattress HighlightsBotanical protection for antimicrobial barrierExtra bouncy surface from two coil layersAdded back support for extra comfortSave with Free Shipping on the Saatva Classic with our discount code. Claim Deal The Saavta Classic is a reinvention of the traditional innerspring mattress, adding on a second pocketed coil layer and memory foam to give this pillowtop mattress an edge when it comes to comfort. Shoppers who love the idea of a bouncy king size mattress may be most pleased by a bed like the Saatva Classic.How Lying Down FeelsThe Saatva Classic can offer one of three firmnesses, but all of them feature a pillow top surface that works to provide conforming pressure relief. The firm option possesses less give for a more supportive feel, keeping the spines of back and stomach sleepers comfortably aligned.The luxury firm and plush options are more ready to conform to the body, hugging sensitive areas to ease tension.What Testers ThinkSusan P. – USA The Saatva Classic Luxury Firm King mattress, after six years of testing, still provides super comfort and durability, showing no signs of wear. The specialized delivery service was commended for its respectful and friendly approach, emphasizing good communication. Susan appreciates the Saatva Classic Luxury Firm for its middle support, pillow-top give, firm sides, and overall attractive appearance. The flexibility in exchanging mattresses to ensure the perfect fit for the guest room highlights Saatva’s commitment to customer satisfaction.Sandra V. – USA Sandra encountered issues with the split king mattress, specifically with overhanging twin mattresses and a low sitting height. Despite a less-than-ideal delivery experience, Saatva’s customer service, particularly Roger, was praised for addressing the concerns professionally. Sandra’s dissatisfaction was primarily related to the split king configuration, and she expressed contentment with the mattress feel itself. Potential buyers considering split configurations should be aware of possible overhang and low sitting height issues.Judy H. – USA Judy’s experience with Saatva over four years reflects the initial high-quality service and excellent customer support. The King Size Luxury Firm Mattress provided unparalleled comfort for the first four years, with the only issue being sagging body indentations on both sides of the pillow-top after that period. Judy remains positive about the overall experience.Inside the MattressThe top of the Saatva Classic is a 3-inch thick Euro pillow top for that seamless, traditional look. The cover fabric is organic cotton, woven to stay cool and dry by wicking away heat and moisture, and treated with a botanical compound for antimicrobial protection.The next layer is dense memory foam with an active wire for added spinal support in the middle of the mattress. An especially important feature for two people sharing a king mattress, who are therefore placing twice the stress on the surface.Serving as the buoyant transition layer are short pocketed coils, with the coils carefully designed and arranged for stronger support under the torso. Most body weight is concentrated in this area, so the extra-strong coils ensure a sleeper stays comfortable while also helping the mattress stand strong.The base of the Saatva Classic is hundreds of open coils, made with tempered steel that snaps back into shape once pressure is removed. These coils are surrounded by dense foam rails to ensure shoppers enjoy a durable mattress with edge support.SEE ALSO: Best Mattress for Adjustable BedsPros Long lasting durability Amazing customer service Low profile to get in and out of easilyCons Some have delivery issues Best King Size Latex Mattress: Avocado Green Mattress Price: $1199-$2899Mattress Type: Latex HybridMattress Height: 11 or 13 inchesFirmness: Medium-firm or gentle firm (7 or 6 on the firmness scale)Best for back and stomach sleepers, hot sleepers, and sustainable shoppersAvailable in twin, twin XL, full (double), queen, king, and California king Warranty 25 Years Sleep Trial 365 Nights Shipping FreeRecommended ForSustainable and organic shoppersBack sleepersStomach sleepersHot sleepersMattress HighlightsGOLS organic cotton cover and wool keep the bed clean and coolPocketed coils are upcycled steel and have five support zonesDunlop latex is durable and comes in two thicknessesSave Free Shipping on the Avocado Green Mattress with our discount code. Claim Deal If you are in the market for an organic mattress, look no further than the Avocado Green Mattress. Avocado aims to make eco-friendly and sustainable beds and, of their seven mattress line-up, the Avocado Green is their most popular.The Avocado Mattress offers a 365-night sleep trial and a 25-year warranty.How Lying Down FeelsBased on reviews, customers who switched to the Avocado Green Mattress say how much the bed has improved their pains, how the pillow top is excellent for their joints, and it supports their backs. The latex, cotton, and wool work together to ensure it feels cool when you first lie down and stays cool all night long.How firm it will feel does depend on whether or not a shopper chooses the optional pillow top. The pillow top helps the surface hug a sleeper’s body better, readily easing pressure points.What Testers ThinkDeb L. – USA Deb enthusiastically praises the Avocado king mattress with a soft top, highlighting an immediate positive experience without any adjustment period. Having transitioned from a king mattress with 5 inches of latex, Deb expresses a high level of satisfaction after a month of use, emphasizing the hope for continued contentment with the mattress.William I. – Not specified William also shared feedback on the king-size standard mattress with a pillow top from Avocado. While acknowledging a smooth ordering and delivery process with helpful personnel, William notes that the mattress is firmer than expected. He expresses a neutral satisfaction, with the hope that the mattress will soften over time.Dean C. – USA Dean provides a balanced assessment of the Avocado mattress, praising its comfort and excellent construction. However, he points out a concern about heat retention, making the bed too hot for him to sleep with covers. Dean recommends the delivery option for the heavy king-size bed and appreciates Avocado’s return policy, indicating the possibility of exploring alternatives better suited to individual preferences.Inside the MattressThis mattress is a hybrid of latex foam and innerspring coils. Plus, the materials in this bed have earned GOTS and GOLS organic certifications for their latex and cotton. The standard version of the Avocado Green Mattress contains wool, but if you prefer plant-based products, the Avocado Vegan Mattress is almost exactly the same bed only it contains cotton in the place of wool.Beneath a quilted organic cotton cover is 3 inches of GOLS certified latex guaranteed to be free of harmful pesticides. With this mattress, you also have the option of adding their Euro-style pillow top for an additional 2 inches of luxury firm comfort. This topper comes in either a soft, plush option or a firm option.The support layer of the Avocado Green features 1,414 spring coils. These coils are zoned to be more flexible around sensitive areas, so you never experience painful pressure points. The perimeter of the mattress has reinforced edge support to cut down on motion transfer and make moving around the bed more comfortable.SEE ALSO: Best Adjustable Bed for Back PainPros Organic cotton and organic wool soft pillowtop Efficient delivery process Targeted support and bounciness from pocketed coilsCons Natural latex foam is heavy Best King Size Hybrid Mattress: Zoma Boost Your browser does not support HTML5 video. Price: $799-$1598Mattress Type: HybridMattress Height: 12 inchesFirmness: Medium (5 on the firmness scale)Best for active people, side and combination sleepers, couples, and chronic pain sufferersAvailable in twin, twin XL, full (double), queen, king, California king, and split king Warranty 10 Years Sleep Trial 100 Nights Shipping FreeRecommended ForSide sleepersCombo sleepersCouplesPeople with chronic painActive adultsMattress HighlightsGel memory foam promote enables pressure-relieving cushionIndependently wrapped coils increase reactivityTransition layer prevents uncomfortable and painful sinkageSave $150 on the Zoma Boost with our discount code. Claim Deal The Zoma Boost mattress is the best hybrid mattress overall. Its innovative design combines graphite-infused memory foam with a cooling quilted foam top for superior comfort and pressure relief.Its unique combination of features makes it one of the most sought-after mattresses on the market today. The Zoma Boost is perfect for anyone looking for an upgrade from their current gel memory foam topper. Enjoy restful sleep without worrying about overheating with this cutting-edge cool technology.Like other Zoma mattresses, the Zoma Boost comes with a 100-night trial and a 10-year warranty.How Lying Down FeelsThe Zoma Boost mattress is designed to offer a medium to medium-soft feel, which is typically preferred by side sleepers. The mattress has a comfortable and supportive feel, providing a good balance between firmness and softness.Sleepers can expect to sink slightly into the mattress’s top layer of quilted foam, which conforms to their body’s shape, providing pressure relief and reducing motion transfer.The infused memory foam in the Zoma Boost ensures that heat is drawn away from your body while you sleep, allowing you to remain cool and comfortable all night long. It also provides superior pressure relief, helping to reduce any aching or soreness associated with poor posture or sleeping on an uneven surface.What Testers ThinkMatthew Grekstas – Dallas, TX After 30 days of testing, Matthew Grekstas finds the Zoma mattress underwhelming, citing issues with excessive firmness leading to discomfort and pressure points on the shoulder and elbow. He also notes manufacturing quality problems, such as rounded corners and uneven material distribution, impacting the overall satisfaction. The mattress’s dimensions exceeding the standard size and unexpected heat retention further contribute to his dissatisfaction, challenging the brand’s claims of enhanced recovery and cooling features.Brandon Z – Charlotte, NC Brandon Z praises the ease of setting up the Zoma mattress and bed frame without tools. As an athlete, he emphasizes the positive impact on his recovery process, noting improved restfulness and the mattress’s ability to mold to his body. Awarding it a 5-star rating, Brandon highly recommends the Zoma mattress for individuals seeking enhanced productivity during the day.Britania – Not specified Britania expresses satisfaction with the firmness and softness of the Zoma mattress but points out a significant issue with the wrong mattress size being delivered. Despite enjoying the mattress, the disappointment arises from receiving a Queen size instead of the requested King size mattress, leading to uncertainty about the return process and raising concerns about accurate order fulfillment.Inside the MattressThe mattress’s advanced cooling cover is made of a breathable, stretchy fabric that promotes airflow and helps to keep sleepers cool and comfortable throughout the night. It’s swift to greet sleepers with a pleasantly icy feel, like a gentle cloud embracing the body. Quilted into this cover fabric is hypersoft foam for a pillowy feel.The mattress’s primary comfort layer is made of graphite-infused memory foam, which provides pressure relief and reduces motion transfer. The gel infusion helps to regulate temperature and prevent heat buildup, making it ideal for sleepers who tend to sleep hot.The next layer of the mattress is made of Reactiv™, a latex-like foam that provides support and bounce. This transition layer helps to prevent sinkage and promotes proper spinal alignment.The mattress’s bottom layer is made of pocketed coils, providing a stable foundation for the mattress and helping to prevent sagging.Pros Quality restfulness for recovery Easy set up Responsive transition foam pairs well with pocketed coilsCons Delivery process can have errors What the testers say: “Zoma promotes their Boost hybrid mattress as the equivalent of lying on your little personal cloud, sinking gently into a plush and cool sleep haven. Their mattress combines advanced cooling technologies and premium materials to ensure you fall asleep faster, stay asleep longer, and wake up feeling refreshed and recharged.” – Dr. Jordan Burns, Zoma Boost Reviewer Read Our Full Review of the Zoma Boost Mattress Best King Size Mattress for Athletes: Bear Pro Price: $1265-$2730Mattress Type: Memory foamMattress Height: 12 inchesFirmness: Medium-firm (6.5 on the firmness scale)Best for all sleep positions and body types, couples, and allergy sufferersAvailable in twin, twin XL, full (double), queen, king, and California king Warranty Lifetime Sleep Trial 120 Nights Shipping FreeRecommended ForHot or sweaty sleepersActive peopleChronic pain sufferersPeople with allergiesMattress HighlightsGel beads in memory foam absorb heat and cushion the body’s curves to relieve pressureCopper infusions in bed are antiviral and antibacterial to keep you and the bed cleanFoams are CertiPUR-US® and GREENGUARD Gold certifiedSave Free Shipping on the Bear Pro with our discount code. Claim Deal The Bear Pro is one of three mattresses offered by Bear, a brand that actively targets athletes with their bedding options. The Bear Pro is an all-foam mattress built to stay cool and improve muscle recovery in pain sufferers or active people.Bear offers a 100-night sleep trial and a 10-year warranty.How Lying Down FeelsThe Bear Pro is slightly softer than Bear’s flagship model, the Bear Original, but still firmer than Bear’s most luxurious bed, the Bear Hybrid.With the bed’s medium-firm feel, customers describe the bed as feeling soft but firm at the same time. And if you plan on sharing your king size mattress, reviewers also noted how they never noticed their partners shifting place in bed.What Testers ThinkSamantha P. – Not specified Samantha P., primarily a stomach sleeper, rates the firmness of the mattress 4 out of 5 and finds it precisely what she needed. Opting for a King to accommodate her tall partner, both enjoy the bed several months in. Samantha recommends this mattress for those seeking a simple, firm sleeping surface, emphasizing its suitability for stomach sleepers.Jennifer M. – USA Jennifer M., a side sleeper, expresses satisfaction with the previously purchased King Pro Hybrid but notes discomfort during pregnancy with the Queen size. Using a mattress topper to address discomfort and hip pain, Jennifer provides a balanced perspective on her experience.Molly D. – USA As a combo sleeper (side and back), Molly D. rates the mattress 4 out of 5, comparing it favorably with a Purple mattress. While occasionally finding it too firm on her side, she appreciates improved sleep quality and minimal partner disturbance. Molly highlights the mattress’s performance during various activities and its temperature regulation, noting minor drawbacks with the included accessories. Overall, she considers it a great value and expresses satisfaction with her Bear mattress trial.Inside the MattressThe Bear Pro features three different technologies designed for temperature control. This gel memory foam includes a copper infusion and a Celliant® cover to wick heat and moisture away from the body as you sleep. The Celliant® fibers in the cover absorb moisture and speed up muscle recovery by increasing local circulation.The comfort layer contains two types of memory foam—one includes a cooling gel foam, and the other features a copper infusion. The gel beads keep you cool by absorbing heat. Since copper is antiviral and antibacterial, the mattress stays clean and germ-free.The transition layer and high-density base increase responsiveness and promote a healthy spine.SEE ALSO: Zoma vs. Bear: Side-by-Side Mattress ComparisonPros Suitable for multiple sleeping styles Minimal motion transfer Excellent temperature regulationCons Not ideal for pregnant women Best Luxury King Size Mattress: Purple Hybrid Premier 3 Price: $2499-$4998Mattress Type: HybridMattress Height: 13 inchesFirmness: Medium-soft (4 on the firmness scale)Best for all sleep positions and body types, hot sleepers, and plus-sized sleepersAvailable in twin, twin XL, full (double), queen, king, and California king Warranty 10 Years Sleep Trial 100 Nights Shipping FreeRecommended ForHot sleepersCouplesCombination sleepersSide sleepersPlus-sized sleepersMattress HighlightsGelFlex Grid™ flexes under your weight to relieve pressureTwo comfort layer options available to suit various sleepersStretchy mesh fabric promotes airflow and keeps the bed drySave Free Shipping on the Purple Hybrid Premier 3 with our discount code. Claim Deal Although Purple® started with one all-foam mattress, the Original Purple ®, they now offer two hybrids, the Purple® Hybrid and Purple® Hybrid Premier. Their Hybrid Premier 3 combines the Purple Grid™ shown in all their mattresses, but also a supportive pocketed innerspring coil system.Purple’s Hybrid Premier comes with a 100-night sleep trial and a 10-year warranty.How Lying Down FeelsWhen pressure is light, the Purple Grid™ responds accordingly, so you always experience just the right amount of comfort. With the Hybrid Premier, you have the option of including either 3 or 4 inches of the Purple Grid™.Based on customer feedback, we recommend going for the 3-inch variation if you’re a combo sleeper or share your bed. Otherwise, the 4-inch option works well for side sleepers or people who weigh more than 230 pounds.What Testers ThinkSally T – USA Sally T, a verified buyer from the United States, praises the Purple King mattress as the an excellent mattress, providing unparalleled joint support and a weightless feeling. Despite having neuropathy, she notes minimal issues due to the weightless support. Sally appreciates the consistent grid structure, highlighting the absence of “rolling into each other” that can occur with mattress breakdown. She expresses immense satisfaction, stating that if she ever needs another bed, it will undoubtedly be another Purple.James – USA James, a verified buyer in the USA, shares a mixed experience with the Purple Hybrid king mattress. Despite his wife’s satisfaction, James reports ongoing back pain and increased tightness since switching from an old mattress. He mentions trying physical therapy without improvement. His feedback suggests varied comfort levels for different individuals.Whitney R – USA Whitney R, a verified tester in the USA, provides a detailed review of the Purple RestorePlus Soft King mattress. Opting for an upgrade due to sagging in their previous Purple mattress, Whitney notes a preference for the older hybrid model. The new RestorePlus model alleviates shoulder pain for her husband but only partially for herself. She highlights the comfort, adjustable base, and some practical considerations, such as a unique smell during the initial week and challenges related to its weight and mobility.Inside the MattressThe cover of the Hybrid Premier features a stretch knit fabric to keep air moving throughout the bed. This cover allows sleepers to feel the supportive Purple Gird just beneath the surface. The Purple Grid™ is made of a uniquely flexible gel material called Hyper-Elastic Polymer®. This material reacts to intense pressure.Separating the grid from the pocketed coils is a transition foam layer, placed to cushion the sleeper and the springs. Supporting all the top layers is a 7.5-inch coil support base wrapped for additional comfort and durability.SEE ALSO: Best Purple Mattress AlternativesPros Joint support Low motion transfer Consistent grid structureCons Not the best option for pain relief Best King Size Mattress for Shoulder/Hip Pain: Helix Midnight Luxe Your browser does not support HTML5 video. Price Range: $1099 to $2349Mattress Type: HybridMattress Height: 14 inchesFirmness: Medium (5.5 on the firmness scale)Best for couples who want to ease or prevent shoulder or hip painAvailable in twin, twin XL, full (double), queen, king, and California king Warranty 15 Years Sleep Trial 100 Nights Shipping FreeRecommended ForSide and combo sleepersHot sleepersCouplesMattress HighlightsTargeted cushion in the shoulder area to ease tensionChoice of Tencel or GlacioTex Cooling fabric coversResponsive pocketed coils provide top comfort for couplesSave with Free Shipping on the Helix Midnight Luxe with our discount code. Claim Deal The Helix Midnight Luxe is an upgraded king size mattress version of their original Helix Midnight, a medium feel mattress designed for side and combo sleepers. It’s got a number of cooling features, but what really sets its comfort apart is the zoned support it offers under the shoulders and hips. Many side sleepers wake up feeling sore and stiff because their mattress can’t quite provide what these areas need, so we recommend the Helix Midnight Luxe for any side sleeper seeking pain relief.How Lying Down FeelsThe Helix Midnight has a responsive medium feel, thanks to its adaptable cushion and responsive pocketed coils. Side sleepers can gently sink into its surface, but combination sleepers should find themselves able to move easily across the surface.As we mentioned, the mattress is designed to feel mildly different under the shoulders and hips, with the hips resting on an added bit of support, while the shoulders feel softer for that extra bit of pressure relief.What Testers ThinkDennis M – USA Dennis M gives the Helix Midnight Luxe a 4-star rating, praising its initial softness and excellent support, especially through the middle that supports the hips. However, he suggests improvements for maneuverability, proposing handles on the mattress and instructions on positioning during unrolling. Despite challenges in placement, Dennis appreciates the overall support provided by the mattress.Amyjo H – USA Amyjo H, a verified buyer, expresses dissatisfaction with the Helix Midnight Luxe, giving it a 1-star rating. She reports breakdown issues after only two weeks, specifically where her husband sits, leading to a sinking feeling in the middle of the king-size bed. Amyjo criticizes the quality and lack of support, advising against recommending the mattress.Ralph K – USA Ralph K, a verified tester, provides a positive review for the Midnight Luxe King, awarding it a 5-star rating. He details the delivery process, emphasizing the mattress’s prompt expansion and lack of noticeable odor. Ralph highlights the comfort aligning with reviews, noting the well-done finishing on the mattress seams, giving it an expensive appearance. He recommends having assistance due to the mattress’s weight during setup.Inside the MattressShoppers can choose a cover fabric of Tencel, made with natural fibers, or GlacioTex fabric with thermal-conducting fibers. This cover fabric works with the underlying memory foam to create a cushioning, pressure-relieving surface. The second foam layer of gel visco provides support to keep the sleeper’s spine a muscles in comfortable alignment, while the transition foam minimizes unwanted sinakge.The core of the Helix Midnight Luxe is more than a thousand pocketed coils, all arranged to provide lumbar support and targeted pressure relief. The coils along the sides are firmer to create edge support, letting sleepers slide out of bed, while the base layer is supportive DuraDense foam.Pros Excellent support Efficient delivery process Minimal off-gassingCons Thick and relatively heavy hybrid mattressBest King Size Mattress Highlights and ComparisonMattressHighlightsComparisonAmerisleep AS3Tailored to adapt to most body types and sleep styles$1299Zoma StartEssential comfort with great body contouring and support$599Vaya MattressDelivers the perfect blend of bounce and support to relieve pressure points$699Nolah Evolution 15Rated 2024's Best Mattress for Side Sleepers by Sleep Foundation$1749Amerisleep AS5 HybridOffers cloud-like comfort and the responsive bounce of pocketed coils$2199GhostBed LuxeCool-to-the-touch quilted cover combined with patented cooling technology$1548Saatva ClassicAmerica's best-selling online luxury innerspring$1696Avacado GreenFeatures GOLS-certified organic latex, GOTS-certified organic wool and cotton$1999Zoma BoostMade with graphite memory foam to relieve pain, absorb motion, and keep you cool$1549Bear ProMade for sleepers who enjoy a responsive feel$1099Purple Hybrid Premier 3Provides core body support and increased responsiveness to pressure and motion$2899Helix Midnight LuxePremium mattress designed with a medium-feel, specifically tailored for side sleepers$1899Types of King Size MattressesOnce you’ve decided to buy a king size mattress, you will need to determine which type of king will fit your needs. Many people may not realize that there are several variations of a king size mattress. Below, we break down the measurements for each king mattress and explain why it might be beneficial for you.King Size Mattress76 inches by 80 inchesA standard king size mattress (also called an eastern king) measures 76 inches by 80 inches. This mattress is the same size as two twin xl mattresses (38 inches by 80 inches). A king is wider than a queen size (60 inches by 80 inches) by 16 inches. But both king and queen size mattresses measure 80 inches in length.California King Size Mattress72 inches by 84 inchesCalifornia king mattresses are 72 inches by 84 inches, so it is 4 inches shorter in width but 4 inches longer than a king size mattress. The extra length makes this size ideal for those over 6 feet tall or those who prefer extra legroom.Wyoming King Size Mattress84 inches by 84 inchesWyoming king size mattresses measure 84 inches by 84 inches—giving it the same length as a California king but 12 more inches in width. This size is ideal for larger couples who may also prefer to co-sleep with children. However, Wyoming kings are not available at most stores or online retailers in the U.S.Texas King Size Mattress80 inches by 98 inchesA Texas king (also called a grand king) measures 80 inches by 98 inches, so it is wider and longer than a California king and has more length than a Wyoming king. But these mattresses can also be difficult to find and may be more expensive.Alaskan King Size Mattress108 inches by 108 inchesAn Alaskan king is the largest mattress you can buy—it measures 108 inches by 108 inches. This massive bed allows very tall sleepers plenty of legroom without having to worry about hanging off the bed.It also affords families who like to co-sleep extra room, so no one has to sleep cramped or close to the edge. Like Wyoming and Texas kings, these mattresses are not as popular as standard kings. So, they can be difficult to find.Split King Size MattressTwo twin xl mattresses (38 inches by 80 inches)A split king is two twin xl mattresses (38 inches by 80 inches) placed side by side to create one standard size king. Most couples have different preferences when it comes to comfort. A split king allows couples to select a different firmness for each side of the bed. This option gives you both the perfect comfort level for your preferred sleep position. A split king can also cut down on motion transfer across the surface of the bed so you won’t disrupt your partner during the night.Learn more about better sleepSign up for sleep health education, expert tips, and the latest and greatest mattress sales. Email See Privacy PolicyBenefits of a King Size MattressAs you can see for the list above, there are mattresses larger than a standard king, but many of these beds are hard to locate and may hurt your budget. A standard king size mattress is a great option for couples who have outgrown their queen size bed.The larger size provides plenty of room to stretch out and can accommodate children who may crawl into bed with you. The greater surface area can also reduce nighttime disruptions if your partner tosses and turns during sleep. While standard kings are often easier to find than California kings, many popular brands also offer a Cal king option.If you have a standard 11 by 12-foot bedroom (132 square feet), a king mattress may be too big for this space. But, if you have a master bedroom or something larger, anything smaller than a king may look awkward.Most master bedrooms measure 14 by 16 feet (224 square feet). So a king or a California king will fit well into this space and still affords you room to move around the bed.Mattress FirmnessMattress firmness is rated on a scale of 1 to 10—with 1 being the softest and 10 being the firmest. Your sleep position and body type are a good sign of the firmness level you’ll find most comfortable.Soft mattress (1 to 2 on the firmness scale): Works best for lightweight sleepers and side sleepers. Since lightweight sleepers tend to sink less, they need a soft mattress to experience contouring.Medium-Soft Mattress (3 to 4 on the firmness scale): Suitable for lightweight sleepers and side sleepers. This firmness will cushion the hips and shoulders when side sleeper, but will also prevent sinking, so the spine stays in a neutral position.Medium mattress (5 on the firmness scale): A true medium is ideal of side sleepers, combination sleepers, and couples. This firmness offers a balance of both cushioning and support. So, even as you change positions throughout the night, your spine will remain in a good position. A medium is suitable for most sleep positions, so couples with different preferences find this firmness to be a good compromise. It’s also an excellent mattress for a guest room.Medium-Firm Mattress (6 to 7 on the firmness scale): Works well for heavy sleepers, back sleepers, and those with back pain. The increased firmness prevents heavier sleepers from sinking too far into the bed, which can force the spine out of alignment.Firm Mattress (8 to 10 on the firmness scale): Firm mattresses are suitable for stomach sleepers, back sleepers, and heavy sleepers. An extra firm mattress will prevent the chest from sinking when stomach sleeping and will keep the hips and shoulders aligned when back sleeping.Mattress TypesAs you shop for a new king size mattress, you will come across several different mattress types. King mattresses don’t just vary in dimension, but they may also feature different materials and support systems. To give you a better idea of what is available, we break down the four most common types below.Memory Foam MattressMemory foam mattresses support your entire body without any added pressure so you can experience a weightless sleep. When resting on this “cloud-like” surface, your muscles will have time to recover, and joints can rest comfortably. With the right firmness, a memory foam mattress will keep your spine in a neutral position and prevent pressure points.But, memory foam can vary in terms of quality. Traditional memory foam tends to trap heat, but those with an advanced open-cell structure are more breathable. Additionally, those made with partially plant-based oils are cleaners and less toxic.Latex Foam MattressLatex foam provides contouring similar to memory foam but also has a slight bounce that causes you to feel more lifted, rather than cradled. Latex foam is eco-friendly and sustainable because rubber trees (the source of latex) do not have to cut down for harvesting. An organic latex mattress is one of the most durable types of beds.Latex foam is also hypoallergenic, antibacterial, antimicrobial, and resistant to dust mites—making latex foam mattresses are an excellent option for allergy sufferers.Hybrid MattressHybrid mattresses have a comfort layer 2 to 3 inches thick. This layer usually features memory foam or latex foam. Beneath the comfort layer, hybrids have a support base of individually wrapped spring coils. Coils are often zoned to provide a balance of cushioning and support, so it is firmer near the back and neck, but softer near the hips and shoulders.SEE ALSO: Hybrid Mattress Buying GuideInnerspring MattressInnerspring mattresses have been around for many years. These beds have a support base of steel coil springs padded with other materials such as cotton, wool, or foam. Some innerspring mattresses may contain foam in their top layer for added comfort, but this layer is typically only 1 inch thick.Since innerspring mattresses have more space between coils, dust and dirt can often collect in these mattresses. This debris can cause breathing issues for those with allergies or asthma.Some spring coil systems are not as durable as an all-foam support base. These springs often become broken or bent and may stick up into sensitive areas—resulting in painful pressure points. Although innerspring mattresses remain popular due to their low price point, they do not offer the support of memory or latex foam.Sleep Trials, Warranties, and Return PoliciesPurchasing a king size mattress is an important decision. To ensure that you are getting the most out of your investment, you will want to ensure that you have time to try out the bed before committing.Sleep TrialIn most cases, it takes anywhere between two weeks to a month to become accustomed to a new mattress. So, you will want a sleep trial that allows you time to test out the bed for at least 30 days. An adequate sleep trial period is not hard to find since most mattress-in-a-box brands offer trials between 90 to 120 nights.SEE ALSO: Best Mattress in a BoxThis trial period lets you test an online mattress while in the comfort of your own home and ensure it’s right for you. When shopping at a mattress store, pushy sales associates often hover nearby while you test out the bed.Buying a mattress with a free sleep trial can cause you to feel pressured into making a decision. Plus, the in-store experience doesn’t afford you much time to sleep on the mattress. With a trial period, you get plenty of time to find out if the best is right for you. If it’s not right, most companies are happy to provide a full refund or let you try out a different model.WarrantiesMost brands stand by the quality of their product by offering a warranty to cover any manufacturing defects such as sagging or indentations. Most brands offer a 10-year warranty, which is roughly the lifespan of most high-quality mattresses.But it’s important to note that mattress warranties do not cover customer misuse, such as water damage from spills. So, it is helpful to protect the surface of your bed with a mattress protector.Return PoliciesA sleep trial affords more time to test the bed, but if the bed doesn’t come with a sleep trial, the brand may include a return policy. Most mattress return policies last around 30 days and will provide you with a full refund if you are unhappy with the bed. Although a 100-night sleep trial is ideal, a 30-day return policy will also help you make the best choice.Overview of All Mattress SizesMattress SizeDimensionsTwin38″ x 75″Twin XL38″ x 80″Full54″ x 75″Queen60″ x 80″King76″ x 80″California King72″ x 84″Other Things to ConsiderWhat is the best king mattress to buy?King size mattresses are not one size fits all. The right firmness and size will vary from person to person. In terms of comfort, the best mattress for you will depend on your body type and preferred sleep position. Our firmness guide listed above can help you locate the right comfort level for your needs. Reading mattress reviews is another way to determine what type of comfort the bed provides. Customer reviews offer valuable insight into the firmness and overall support of the mattress.In terms of size, a standard king is suitable for most couples and those under 6 feet. Larger couples and those taller than 6 feet may find a California king more comfortable.What is a good price for a king size mattress?A king mattress can cost anywhere from $850 to $3,000. But the cost will fluctuate depending on the type of mattress and the materials used. Hybrids cost more than memory foam mattresses, and latex beds are typically more than memory foam beds.Who is a king size mattress best for?King mattresses are one of the best mattress sizes for couples. While queen size beds are decent for couples, king size mattresses provide ample space for couples to stretch out and truly have their own space to relax. Although king mattresses are expensive and take up lots of room due to their size, it’s worth it for adult couples.What’s the best king size mattress for back pain?Look for king mattresses with a medium-firm feel, ones of the healthiest firmnesses for relieving back. A medium-firm king size mattress will align your spine without causing pressure build-up around the lumbar spine.We recommend checking out mattresses such as the Amerisleep AS2, Zoma Mattress, Avocado Green Mattress, or Purple Hybrid Premier.What’s the best king size mattress for a side sleeper?Side sleepers should keep an eye out for softer king size mattresses to properly cushion their hips and shoulders. This way, side sleepers won’t have to deal with pressure build-up and pain at nighttime.Several softer king size mattresses we usually recommend include the Amerisleep AS5 Hybrid, Zoma Hybrid, and Purple Hybrid.ConclusionIf you and your spouse are feeling cramped in your queen size mattress, upgrading to a king is a sure-fire way to find better sleep. If you’re a solo sleeper and prefer plenty of room to stretch out in bed, a king is also a great option. Although kings do come at a higher cost, most people find the extra space well worth the investment. Plus, if you have a larger bedroom, a king will help to fill out the space comfortably. The tips included in this guide will help you find the right size and firmness for a good night’s sleep.About the author Kiera PritchardKiera Pritchard’s curiosity around dreams and dreaming sparked her passion for sleep science. In addition to freelancing for eachnight, Kiera is also a physical trainer and strives to help others lead healthy lives while asleep and awake. Since joining our team, Kiera has compiled multiple sleep health guides offering our readers advice on how to improve their days and evenings. Find more articles by Kiera Comments Cancel replyLeave a CommentYour email address will not be published. Required fields are marked * Comment Name Email I agree to the Terms and Conditions of this website. Δ