Save 20% on our best overall pick, the Helix Midnight Luxe.
Our sleep-certified editors jumped, rolled and sprawled on over 200 beds to find the best king-size mattresses for different sleep positions and preferences. When analyzing the data from our tests, we didn’t just check for comfort; we examined factors most critical for king-size beds, including exceptional edge support, minimal motion transfer (so your partner can toss and turn without bothering you) and durability. The proved to be the top choice overall, thanks to its cushy pillow top and medium-firm feel. If you’re a back or stomach sleeper though, we recommend the ; its firm to medium-firm feel is hard to beat.
Why We Named It Best Overall
For the same reasons we chose the Helix Midnight Luxe as the best mattress of the year, we’ve named it our top pick for the best king size: It accommodates a wide range of sleeper types and body sizes, has great edge support and deadens movements from a restless partner.
How It Performed During Testing
Our team found it to feel equal parts comfortable and supportive, thanks its cushiony pillow top, dense foam layers and thick base of coils. The foam molds to your body without making you feel like you’re “stuck” in the mattress, while the pocketed coils provide sturdier lumbar support and edge reinforcements—a serious plus for couples who want to sprawl out (or anyone who likes to sit or sleep near the side of the bed, really). The Luxe also tested well for motion isolation: Updates writer Alexandra Garrett says she could barely feel when someone moved around on the other side of the bed.
Who Shouldn’t Buy It
The Midnight Luxe is rated as a 6 out of 10 on the firmness scale, meaning it skews more medium-firm than firm. As such, it’s not supportive enough for most strict stomach sleepers; consider the instead, which is essentially a firmer version of the Midnight.
Related: For more details, see our full Helix Midnight Luxe Mattress review.
Why We Named It Best Hybrid
The Leesa Sapira Chill Hybrid Mattress may appear conventional, but we found it offers a uniquely responsive feel, delivering ample cushioning without the typical sinking sensation often associated with dense foam layers.
How It Performed During Testing
While the Sapira Chill Hybrid can accommodate nearly any sleep position and body type since it comes in three firmness options, senior mattress and sleep editor Bridget Chapman found the plush is best for side sleepers and those who love a soft feel, while the medium-firm can accommodate all sleeping positions for lightweight and average-weight sleepers. For strict stomach sleepers, heavier folks and those who want a more “on top” feel, we recommend the firm model.
Who Shouldn’t Buy It
Sleepers who prefer a doughy, deeply contouring feel are better suited for an all-foam mattress. Even the plush Sapira model will still provide a more lifted, bouncy feel than these individuals may prefer.
Related: Learn more in her full Leesa Sapira Chill Hybrid Mattress review.
Why We Named It Best Cooling
The Aurora Luxe Cooling Mattress from Brooklyn Bedding comes with more active cooling features than any other bed we tested—five, to be exact. Notably, while other mattresses on our list require you to pay extra for a GlacioTex cooling cover, this one comes with it. Unsurpisingly, it takes the cake for best overall in our roundup of the best cooling mattresses.
How It Performed During Testing
Senior mattress and sleep editor Bridget Chapman slept on the medium Aurora Luxe for over a month and says she was impressed by its ability to prevent her from overheating. As for overall comfort, five different members of our team tested the firm model of the Aurora Luxe and concluded that it’s a good choice for a variety of sleeping positions: Overall, we scored it an 8 out of 10 for side sleepers, a 9.5 for back sleepers and an 8.5 for stomach sleepers.
Who Shouldn’t Buy It
Skip this mattress if you prefer a bed with deep sinkage. If this sounds like you, a memory foam mattress, like the , is a better choice because it has the slow-moving feel you’d expect from the material.
Related: See more in our Brooklyn Bedding Aurora Luxe Mattress review.
Why We Named It Best For Side Sleepers
The Nolah Evolution has a plush 2-inch Euro pillow top with three layers of foam underneath, including one with zoned perforations so it’s cushier under the shoulders and firmer under the lumbar region for added support. This makes it ideal for side sleepers, who tend to feel the most pressure on their hips and shoulders. It’s also a favorite in our guide to the best mattresses for side sleepers in 2026.
How It Performed During Testing
Chapman found it gave her a cozy hugging feel without sucking her in. It also tested well in categories that are important for couples, thanks to a base of pocketed coils that provide firmer support in the center and around the perimeter. This kept our testers feeling supported from edge to edge. Chapman also says she could barely feel the movement from her partner or animals when they gathered on the bed (except for when her 60-pound pup would jump on the mattress).
Who Shouldn’t Buy It
While the Nolah comes in multiple firmness levels, it’s not our top choice for stomach sleepers due to its thick pillow top, which can throw the hips out of alignment with the spine when lying in the prone position.
Related: Get more information in our full Nolah Evolution Mattress review.
Why We Named It Best For Back And Stomach Sleepers
The DreamCloud Hybrid’s firm feel and supportive design makes it especially well suited for back and stomach sleepers. It features multiple foam layers that work in tandem to contour to your curves and keep everything properly aligned, especially along the lower back.
How It Performed During Testing
Our testing also found it has solid ease of movement, meaning you can change positions between your back and side and get in and out of bed more easily. And while it doesn’t necessarily feel cool to the touch, our testers did find it more breathable than other options.
Who Shouldn’t Buy It
If you’re looking for a truly bouncy, responsive mattress that also feels firm, we recommend the instead. We also recommend side sleepers look elsewhere, given this bed’s firmer feel.
Related: For more details, read our DreamCloud Hybrid Mattress review.
Why We Named It Best For Back Pain
The Saatva Classic Mattress was designed with back pain relief in mind: It has a strong dual-coil construction and multiple layers designed for targeted lumbar support.
How It Performed During Testing
It has some of the best edge support we’ve ever tested, meaning the sides barely budge when sitting or lying on them. We also felt a noticeable difference in the level of support, thanks to the “spinal wire”—a strip of memory foam in the center of the bed—that provides additional support for the midsection and back.
Who Shouldn’t Buy It
The Classic has two sets of springs, which makes it less motion-isolating than others on this list. Couples who don’t want to feel their partner’s tossing and turning should look elsewhere.
Related: See more in our Saatva Classic Mattress review.
Why We Named It Best Memory Foam
Tempur-Pedic is an industry leader when it comes to memory foam, and we found the Tempur-Adapt model did a great job at relieving pressure buildup and deadening movement.
How It Performed During Testing
Memory foam is known for retaining heat, but the Tempur-Adapt Mattress comes with a cooling cover that draws heat away and feels physically cool to the touch. We found it did a good job at regulating temperature during testing, along with the open-cell comfort foams that are more breathable than traditional foam.
Who Shouldn’t Buy It
If you weigh over 250 pounds and need more sturdy support, we recommend optin for a hybrid that contains a coil base, like the .
Related: For more details, check out our Tempur-Pedic Adapt review.
Why We Named It Best Firm
The Plank Firm Luxe Mattress is one of the firmest beds we’ve ever tested, and it’s flippable with two firmness levels in one bed—one side is firm and the other is extra-firm—so you can choose the right one for you.
How It Performed During Testing
We like the firm side of this mattress for most back and stomach sleepers; if you weigh over 250 pounds and are really seeking maximum support, though, the extra-firm side is your best bet. Both sides have sturdy edge support, which is also a sign of solid durability. Hot sleepers can also choose to upgrade to the GlacioTex cover, which can help draw heat away from your body and evenly distribute it throughout the mattress.
Who Shouldn’t Buy It
Because this mattress is very firm, it doesn’t provide the pressure relief that strict side sleepers need. (They should opt for a softer bed, like the , instead.) Similarly, people who weigh under 150 pounds should also consider a plusher pick.
Why We Named It Best Latex
The Avocado Green uses naturally-sourced latex as the core of the bed, but it doesn’t stop there: The rest of the mattress is ripe with organic materials, and it scored highly for key areas like support, comfort and responsiveness.
How It Performed During Testing
Materials aside, it’s a great choice in terms of sensation. The Avocado Green Mattress comes in three firmness levels, which we appreciate since a lot of latex hybrid mattresses fall on the firm to very firm end of the spectrum. Our testers found the firm model of the Avocado Green has a slightly firmer feel, while the plush model is one of the softest beds on the market. With that in mind, we recommend that side sleepers consider the plush model, back sleepers consider the medium and stomach sleepers consider the firm.
Who Shouldn’t Buy It
The medium and plush versions of the Avocado Green cost extra. Because of this, we recommend that budget-minded side sleepers consider a different mattress, especially if they don’t want to spend an additional $1,440 on the plush model or $800 on the medium model.
Related: See more in our detailed Avocado Green Mattress review.
Why We Named It Best For Heavyweight Sleepers
Built for sleepers weighing up to 500 pounds per side, or 1,000 pounds total, this firm hybrid is made with foams of varying densities for comfort and support. It also features reinforced edges and is topped with a breathable cover. (It also nabbed one of the spots in our mattresses for heavy people guide.)
How It Performed During Testing
For people weighing over 250 pounds, we found its profile should feel like a medium-firm, making it ideal for back, stomach and combination sleepers. It also tested well for edge support, and its neutral foam feel made it easy to switch positions on.
Who Shouldn’t Buy It
Regardless of body type, side sleepers should consider a softer bed than the Helix Plus. We recommend the if side sleeping is your go-to position.
Why We Named It Best Value
The Cocoon Chill Mattress has an affordable price tag under $1,500 and doesn’t skimp on added features like varying layers of memory foam and a cooling cover to absorb body heat.
How It Performed During Testing
After testing, we think it falls around a medium to medium-firm feel, making it a good choice for most side and back sleepers. We also found that it has a dense, slow-responding memory foam profile that feels firm at first but softens as your body warms up the foam.
Who Shouldn’t Buy It
If you’re looking for more support and airflow through the mattress though, choose the . This model provides more durability and breathability than the memory foam version, which is a better choice for hot sleepers and heavyweight individuals.
Other King-Size Mattresses We’ve Tested
We tested over 200 beds to identify the best king-size mattresses for all sorts of sleepers. While the four models below didn’t make our final list, they’re featured in our guide to the best mattresses of 2026 and may still be a good fit for you.
- Best Soft: (Forbes Vetted score: 4.5 out of 5): This bed delivers plush comfort and generous pressure relief, making it a nice option for many side and back sleepers. However, it lacks edge support, which causes the perimeter to sink when you sit or lie on it—not ideal for couples looking to use the entire mattress space.
- Best For Couples: (Forbes Vetted score: 4.75 out of 5): Ideal for many back-, side- and stomach-sleeping couples, the Bear also excels at limiting motion transfer, so you won’t feel your partner’s tossing and turning. However, it lacks support for heavyweight individuals. Read more in our Bear Elite Hybrid review.
- Most Comfortable: (Forbes Vetted score: 4.75 out of 5): This plush and airy bed is our favorite pillow top mattress for 2026, and it’s an ideal pick for many back and side sleepers, as well as individuals who sleep hot. Motion isolation is somewhat lacking though, meaning you’ll feel some of your partner’s movements. Read our WinkBed mattress review for more detail.
- Best Luxury: (Forbes Vetted score: 4.8 out of 5): The Stearns & Foster Reserve offers a hotel-like experience with luxurious Tempur-Pedic foam and a hand-sewn pillow top. While its responsiveness and pressure-relieving abilities make it suitable for all sleeping positions, it isn’t the best choice for restless couples—motion isolation is lacking compared to others we tested.
How We Test The Best King-Size Mattresses
To properly test the best king-size mattresses, we started with a rigorous research process to first identify a set of contenders for initial consideration. From there, we evaluated each bed’s performance across key factors like construction, edge support and cooling. Learn more in our guide to how we test and score mattresses.
Our Process
- Expert insights: Our sleep editors and certified sleep science coaches, Bridget Chapman and McKenzie Dillon, seek out highly rated mattresses from tried-and-trusted brands, ultimately selecting the strongest contenders for our testing process.
- Panel testing: We recruited a diverse panel of testers, covering a wide range of body types and sleep styles, to make sure our findings are comprehensive.
- Long-term testing: We often have long-term testers sleep on the winning models for at least 30 nights in their homes and share their findings.
Our Panelists
- Bridget Chapman: A side and back sleeper who runs warm.
- McKenzie Dillon: A combination stomach and side sleeper.
- Katie Simpson: An extra-hot sleeper who prefers her side and back.
- Alexandra Garrett: A dedicated side sleeper with lower back pain.
- Anna Perling: A staunch back sleeper.
- Emmy Favilla: A combination side, back and stomach sleeper.
- Kim Peiffer: A side sleeper with neck pain.
- Claire Epting: A devoted side sleeper.
- Lee Cutlip: A hot sleeper who opts for her side and stomach.
- Monica Petrucci: A hot-sleeping stomach and back sleeper.
- Luke Frangis: A combination stomach and side sleeper.
- Alex Noonan: A stomach sleeper with lower back pain.
Our Criteria
- Construction: We prioritized beds with a hybrid construction, because they provide enhanced support and durability for couples. However, we made exceptions for the , which contains an extra-dense Tempur material—a much thicker, more supportive type of foam than standard memory foam.
- Edge support: We sit and lie on the edge of the bed in the three main sleeping positions: side, back and stomach. Then, we document whether we feel the sides of the mattress sagging or faltering under our weight. In order to earn a spot in this guide, each mattress needed to score at least a 7 out of 10 for edge support.
- Motion isolation: We have one person lie on the mattress while another tosses and turns on the other side. We also place a glass of water on the bed and document how much the water inside the glass moves as we toss and turn and change sleeping positions.
- Cooling: We evaluate each layer of the mattress to see if it’s fitted with cooling features, such as a cool-to-the-touch mattress cover. We then document how long its cooling sensation lasts and sleep on the mattress overnight to note how warm (or cool) we feel in the morning.
What To Consider When Buying A King-Size Mattress
Mattresses are highly individual, so it’s important to consider your unique needs and preferences before buying one. Factors like the mattress’ construction, size and firmness also play key roles in how a bed feels. Below, we breakdown these features and how to find the right king-size mattress for you.
Mattress Type
King-size mattresses are made of different materials and constructions that impact how the bed feels. Some excel at pressure relief in targeted areas, while others provide ample support all around. Here are the most common mattress types you’ll come across while shopping.
- Memory foam mattresses offer superb pressure relief and motion isolation, making this type a good choice for couples and people with back pain. However, some people don’t like the sink-in feeling of these beds.
- Innerspring beds are firm, bouncy and tend to sleep cooler than memory foam. They’re a good choice for some back and stomach sleepers, but tend to lack the plushness preferred by side sleepers.
- Hybrid mattresses blend together elements of innerspring and memory foam beds. They have a coil system on the bottom and comfort layers on top to produce a balanced, supportive yet soft feel. They’re also more responsive than a memory foam mattress, making it easier to move around and change sleeping positions.
- Latex foam beds excel at deep contouring for pressure points, while sleeping cooler than all-foam mattresses. Natural latex, like Talalay or Dunlop, is also more eco-friendly and hypoallergenic than manufactured foams.
Sleep Position And Firmness
Mattress firmness is a way to rate its ratio of softness and support. According to Dr. Eva Lassey, Doctor of Physical Therapy and CEO of DrSensory, it should align with your go-to sleeping position to “help better distribute body weight and maintain proper spinal alignment.” Here’s which firmness our sleep team recommends for each sleeping position:
- Soft mattresses for side sleepers, thanks to ample cushioning that cradles joints and alleviates pressure points at the knees, hips and shoulders. Dedicated side sleepers may consider mattresses with plush comfort layers or pillow tops for extra contouring relief.
- Medium-firm mattresses for back sleepers or combination sleepers (in other words, folks who switch positions), since they provide a “just-right” balance of support and softness while keeping the spine aligned. Some dedicated back sleepers may be more comfortable on a firm mattress, depending on support needs.
- Firm mattresses for stomach sleepers, as this sleep position requires the most support to keep the body elevated while preventing the hips and stomach from sinking too low—and thus, throwing the spine out of alignment.
Body Type
In addition to your preferred sleep position, body type also plays a huge role in how a mattress feels and how accommodating it is. Here’s what each body type should keep in mind:
- Average-weight individuals between 150 and 250 pounds can fare well with nearly any mattress type, given that it aligns with their preferred sleeping position.
- Lightweight individuals, who are less than 150 pounds, do best with a softer mattress because they don’t sink into the bed as much as average and heavyweight sleepers, making it feel slightly firmer than advertised.
- Heavyweight individuals, who are over 250 pounds, generally require a firmer mattress with sturdy support. Because they sink farther into the bed than average and lightweight sleepers, the mattress feels softer than advertised.
- Tall individuals also benefit from king-size beds, as this size gives them more space to spread out and sleep comfortably.
Room Size
King-size mattresses take up a lot of floor space. At a standard 76 x 80 inches, these beds require a bigger bedroom than a queen-, full- or twin-size mattress. Be sure to measure your bedroom before purchasing a mattress to ensure it can fit comfortably in your space. By contrast, a California king mattress is slightly narrower and longer than a standard king, at 72 x 84 inches.
Types Of King-Size Beds
King mattresses are available in several different sizes. Although they can each comfortably accommodate two adults plus small children and/or pets, the exact dimensions vary.
A standard king-size mattress is 16 inches wider than a queen-size but the same length, while a split king combines two twin XL mattresses—a benefit for couples who have different firmness preferences or want an adjustable bed. If your feet hang off a queen-size mattress, a standard king won’t help since it’s the same length. However, a California king is four inches longer to accommodate taller individuals. Both a Texas King and Alaskan King add inches to both the width and length to produce the biggest possible sleep space. That said, they don’t always come standard at most mattress companies.
Why Trust Forbes Vetted
We spend a lot of time thinking about sleep here at Forbes Vetted. As a result, we’ve published a large collection of mattress and sleep guides, which includes dozens of mattress stories—all backed by our hands-on testing and years of experience covering the category.
- Mattress and sleep editors Bridget Chapman and McKenzie Dillon are certified sleep science coaches and professional mattress testers. Together, they’ve reviewed over 200 mattresses, including all of the ones above, and oversee all of the recommendations in this guide.
- We’ve tested all sorts of mattress sizes, from smaller options—like the best twin-size mattresses and queen beds—to alternatives, such as the best split-king mattresses and California king mattresses. We’ve also written about many of the best mattresses for couples.
- We routinely update this guide to revisit our recommendations and advice. It was last updated in March 2026 by sleep updates writer Alexandra Garrett, who’s tested over 40 mattresses, including all of the beds on this list.
Our Experts
- , PT, DPT, CEO of DrSensory, a health and education platform that supports children and adults with motor and sensory issues.