Our team at Sleep Foundation conducts extensive hands-on tests for each mattress to provide you with the most reliable, data-driven recommendations and reviews. Below are key guidelines that inform our testing methodology:
A king size mattress can comfortably fit you and your sleep partner with plenty of room for both of you to stretch out. We recommend a king for anyone who needs extra space while they sleep. This size might also be practical if pets or small children share your sleep area from time to time. Split king models cater to people who own adjustable beds.
As a standard size, king mattresses are widely available, and you can choose from many different options. Below is a list of mattresses that our testing team has determined to be the best options for king size. Our team performed thorough research and hands-on tests to ensure that this list includes the best overall mattresses on the market. We considered criteria such as price-point, since king beds cost more money than beds in smaller sizes. We also looked at durability and temperature neutrality, since king size beds are often purchased by couples.
Minimal pressure buildup was evident when we tested the DreamCloud for pressure relief. This can be attributed to its thick foam layers. Motion isolation was another highlight for our team. Unlike most hybrids, which feel responsive and bouncy to a degree, the DreamCloud eliminated most transfer on the surface. Our testers detected little to no movement from the other side of the mattress.
The Nectar Mattress is a firmer-than-average memory foam model that excelled during our pressure relief tests. The mattress also has an approachable price-point that should appeal to shoppers on a budget.
A 2-inch comfort layer ensures even contouring from head to toe, which our side-sleeping testers found improved spinal alignment and alleviated pressure points in the process. Meanwhile, the medium firm (6) feel was not too soft for testers who weigh under 230 pounds. Phase change material in this layer is engineered to absorb and release heat, resulting in a reasonable temperature. Beneath the comfort layer is a 3-inch transitional layer made of polyfoam, followed by a 7-inch support core of high-density polyfoam. A cover containing cooling fibers encases the mattress.
In addition to the affordable pricing, Nectar further incentivizes value seekers with free shipping anywhere in the contiguous U.S. and a sleep trial that spans 365 nights in length. The mattress is backed by a lifetime warranty covering structural and manufacturing defects for as long as you retain full ownership.
Standard WinkBed models include the Softer (4), Luxury Firm (6), and Firmer (7). These mattresses begin with Euro-top layers containing adaptive foam, followed by an additional foam layer. We found that the cushioning level varied by firmness, but all three standard designs contoured evenly to distribute our weight and reduce pressure in sensitive spots like the shoulders and hips. The fourth option, WinkBed Plus (8), swaps out the second layer for responsive latex, resulting in a more supportive feel. WinkBed has specifically designed the Plus for people who weigh more than 230 pounds, and this claim was affirmed by most of our testers in this weight range.
Our testing also indicates the mattress is a good option for hot sleepers. This is thanks to the breathable Tencel cover and a coil system that promotes steady air circulation throughout the interior. Other strengths of the mattress include strong edge support, good ease of movement across the surface, and above-average motion isolation.
The Classic is available in three firmness levels: soft (3), medium firm (6), and firm (8). All three share the same general construction, which begins with a Euro-top cover. Layers of adaptive foam and fiber fill give the mattress an invitingly plush surface, while a strip of dense memory foam cradles the lower back. Even on the firmest model, we noticed deep cushioning from these layers. The pocketed minicoil transitional layer maintained an even surface for our bodies, resulting in minimal sinkage for most of our testers.
The support core contains recycled-steel hourglass coils with a low gauge of 13, ensuring robust support. You can choose between an 11.5-inch mattress with 4-inch coils or a 14.5-inch model with 7-inch coils. We recommend the latter for people weighing more than 230 pounds, though our tests showed both designs are highly supportive. A cover made of breathable organic cotton encases the entire mattress.
The Saatva Classic excelled at cooling when we tested it for temperature control, and our thermal sensors picked up very little heat retention. This was especially true of the medium firm and firm models. We also measured minimal perimeter sinkage on these models during our edge support tests, and most of us could move across them without sinking too much. The soft Classic outperformed the firmer models in other areas, including motion isolation and pressure relief.
Pocketed coils in a zoned configuration make up the support core. These coils offer ample pushback to the midsection, where many people carry a disproportionate amount of weight. Extra coils also line the perimeter of the mattress to reinforce the edges. The coils rest on a polyfoam base layer for extra stability. A cover made from ArcticTex fiber, which is engineered for cooling, encases the mattress.
Depending on the firmness level, the Evolution 15 varied in performance across our testing criteria. The softest model absorbed most movement transfer and noise, making it a great choice if you share the bed with a restless sleep partner. Couples who value responsiveness for sex may prefer the two firmer models, which earned higher marks in our ease of movement and edge support tests. All models performed exceptionally well in our temperature regulation tests, thanks to the breathable cover and airflow through the support core.
Seven sizes, including a split king, are available. Nolah offers free shipping to all customers living in the contiguous U.S. You can test the Evolution 15 with a 120-night sleep trial, during which you can return the mattress anytime after the 30-night break-in period. If you decide to keep the mattress, it is backed by a lifetime warranty.
The Nectar Premier Copper is a solid choice for co-sleepers who awaken easily due to movements in bed. We're also recommending this mattress for side sleepers, people with pressure points, and anyone who normally sleeps hot on all-foam beds.
People sharing a bed with a restless sleep partner often benefit from a mattress with thick foam layers that absorb motion and noise. During our motion isolation tests, we found that the Nectar Premier Copper excels at motion isolation. Our testers noticed virtually no transfer when lying next to another person, even when they changed sleep positions or got off the mattress.
The Premier Copper is constructed with phase change material (PCM) beneath the cover. PCM is engineered to capture and release body heat, and we detected minimal heat buildup when testing the mattress for temperature control. A comfort layer of adaptive memory foam contours evenly to distribute your weight and alleviate pressure along your spine. This is followed by transitional polyfoam that provides added cushioning while keeping your body on an even plane.
The support core contains high-density polyfoam that prevents uncomfortable sagging and promotes spinal alignment. We found that this layer reinforces the medium firm (6) feel without making the mattress feel overly stiff or rigid. At 14 inches thick, we consider the Premier Copper a high-profile model.
Side sleepers on our team weighing at least 130 pounds gave the Premier Copper its most favorable ratings. The combination of deep cushioning and sturdy support should foster ideal sleep conditions if you fall into this position category and weight range. Our back sleepers up to 230 pounds and stomach sleepers under 130 pounds also found the mattress comfortable.
In addition to its excellent motion isolation, the Premier Copper performed well during our pressure relief tests. The foam contours closely enough to cradle the shoulders, hips, and other sensitive areas along the spine that are vulnerable to pressure buildup. Our temperature control tests also revealed low heat retention for a high-profile mattress with all-foam construction.
Nectar ships free to customers in the contiguous U.S. and offers a generous 365-night sleep trial. If you decide to keep the Premier Copper mattress, it comes with a lifetime warranty against structural defects.
The support core uses pocketed coils in a zoned configuration. Thinner coils cushion your legs and shoulders while thicker ones provide pushback to your midsection and bolster the mattress perimeter. A polyfoam base layer prevents the coils from shifting, and a fabric cover with phase change material encases the mattress.
Shipping is free if you live in the contiguous U.S., and Brooklyn Bedding offers a 120-night sleep trial to test the mattress. You can return the mattress for a full refund anytime after the 30-night break-in period. If you decide to keep the Aurora Luxe, it is backed by a 10-year warranty.
Sleepers who seek relief for painful pressure points typically gravitate towards beds with deep cushioning, but this can sometimes come at the cost of firmness and support. The Bear Star Hybrid mitigates this problem with a Euro-top and thick foam layers over a pocketed coil system, resulting in noticeable contouring and strong support. Our side sleepers were particularly impressed with this mattress and its pressure-relieving abilities.
Thanks to the thick profile and medium firm (6) feel, we recommend the Bear Star Hybrid to anyone seeking a combination of close cushioning and good overall stability. The mattress begins with a plush Euro-top over a three-layer comfort system featuring polyfoa