Best King Mattresses of 2026: Expert Tested and Reviewed
King sized beds are not all made the same. Some are designed to cool, others to help relieve pain. Here’s how the best king-sized mattresses stack up.
- The Nectar Classic Memory Foam is our top pick because it earned the highest overall score in our testing, 9.9 out of 10, and performed well in pressure relief, motion isolation, cooling, and edge support.
- Mattresses in this roundup range from $689–$2,570.
- Hybrid mattresses make up most of our picks because they tend to offer a strong mix of cooling, support, responsiveness, and edge support.
- Several mattresses in this roundup performed well for specific needs, including back pain, neck pain, side sleeping, spinal alignment, and affordability.
- Every mattress in this roundup has free shipping, though not all have white-glove delivery.
NCOA supports everyone’s right to age well. So we take the time to research, test, and recommend products that can help you live a healthier life. We’ve spent more than 2,500 hours researching and testing mattresses to give you the most accurate product reviews. To find the best mattresses, we:
- Consulted with sleep specialists like doctors, occupational therapists, and physical therapists for guidance on choosing the best mattress
- Put more than 130 models through a series of 19 different tests at our in-house lab
- Mystery-shopped more than 40 brands
- Surveyed more than 2,000 older adults on their sleep quality
- Interviewed experts on the importance of good sleep for older adults
- Worked with older adult testers to evaluate mattresses and get their opinion
- Read thousands of verified customer reviews
We’re constantly testing new mattresses and sleep products to give you the most accurate and up-to-date recommendations. Read more about our mattress review methodology.
High-quality sleep is key to good health. Many factors contribute to getting the kind of health-supporting sleep a body needs. These can include a calm sleep environment, daily exercise, and winding down before bed. One factor that's often overlooked: mattress size.
King size mattresses are useful for people who share a bed with a partner, pets, or for people who just like to stretch out in bed. Whether you share a bed or just value extra space, the features of a king size mattress can make a big impact on your sleep quality. We tested dozens of king-sized mattresses for comfort and support. We also researched their reviews and tracked their prices to help you find the best king size mattress.
- Highest overall score in our testing
- Excellent motion isolation
- Strong pressure relief for all sleep positions
- Strong pressure relief for back and side sleepers
- Cooling hybrid design
- Responsive for ease of movement
- Outstanding pressure relief for side sleepers
- Strong edge support
- Cooling you can notice
Best King-Size Mattress 2026
- Nectar Classic Memory Foam: Best Overall
- Helix Midnight Luxe: Best for Neck Pain
- Leesa Sapira Chill: Best for Side Sleepers
- DreamCloud Classic Hybrid: Best Luxury
- Saatva Classic: Best for Back Pain
- WinkBeds Luxury Firm: Best for Spinal Alignment
- Bear Elite Hybrid: Best Hybrid
- Silk & Snow Hybrid: Best for Back Sleepers
Comparing the best king-size mattresses
| Comparison Features | ||||||||
|---|---|---|---|---|---|---|---|---|
| Score (out of 10) | 9.9 |
9.0 |
9.8 |
9.0 |
9.4 |
9.2 |
7.9 |
9.0 |
| Best for | Overall |
Neck pain |
Side sleepers |
Luxury |
Back pain |
Spinal alignment |
Hybrid |
Back Sleepers |
| Brand firmness rating | 6.5 |
6 |
6 |
6.5 |
6 |
6.5 |
6 |
5 |
| Trial period (nights) | 365 |
120 |
120 |
365 |
365 |
120 |
120 |
365 |
Understanding accessibility and pain relief scores
Based on our testing, surveys, and focus groups with older adults, we created these two scores:
- Accessibility score: The higher the score, the easier it is to get in and out of the bed and change positions.
- Pain relief score: The higher the score, the more likely it can help relieve pain.
Top features of the best king-size mattresses
We looked for the following features when choosing the best king-size mattresses:
Nectar Classic Memory Foam: Best King-Size Mattress Overall
Nectar’s flagship memory foam mattress is our Best King-Size Mattress Overall because it scored well across all categories and sleeping positions. It’s cooling, offers a medium-firm feel, and scored 5/5 for motion isolation (a plus for a shared king bed). One more perk? It’s one of the least expensive mattresses on this list.
Nectar Classic Memory Foam
Best Overall- Great motion isolation (5/5)
- Combination sleeper-friendly
- Good pressure relief
- Our pain relief score: 4.31/5
- Accessibility score: 4.3/5
- Mattress type: Memory foam
- Brand’s firmness rating: 6.5/10
Pros
- Highest overall rating in our testing
- Yearlong trial period
- Supports all sleep positions
- Stays cool
Cons
- High height may be challenging for some
- May cause sinkage for higher-weight sleepers
Why our testers chose the Nectar Classic Memory Foam as the Best King-Size Mattress Overall
Out of the over 130 mattress models we’ve tested, the Nectar Classic Memory Foam earned the highest scores of all. Its 9.9/10 score reflects exceptional bounce, especially for a memory foam bed. It also highlights the bed's high pressure relief scores for all sleep positions and a perfect motion isolation score. Plus, the bed offers strong edge support, earning a 4 out of 5 from our testers who felt sturdy when sitting on the bed’s side.
Our testers found the Nectar Classic to be one of the best mattresses tested for motion isolation. “It’s not moving at all,” one tester said during a motion isolation test. “If I was asleep, there’s not a chance this would wake me up. If motion isolation is your priority, I would definitely recommend this mattress.” Since king size mattresses are often shared with a partner, such high motion isolation marks pushed the Nectar Classic to the top of this list.
Our testers also reported that the Nectar Classic sleeps pretty cool—another bonus for co-sleepers in a king. “I don’t feel like there’s lots of airflow, but the temperature itself doesn’t appear to be increasing,” noted one tester. If you wanted to keep your king-size Nectar Classic even cooler, you could always pair it with the best cooling sheets. Or you can take a look at our roundup of the best cooling mattresses.
Who is the Nectar Classic Memory Foam right for?
A key reason the Nectar Classic is our best king size mattress overall is that it can work for all kinds of sleepers. Our testers tried co-sleeping to test motion isolation. They rated pressure relief, temperature control, bounce, and more. The Nectar Classic did well in all categories and features a budget-friendly price tag.
| I may love it if I: | |
| Sleep with a partner | Yes |
| Have chronic pain | Yes |
| Feel hot at night | Yes |
| Have mobility concerns | Yes |
| Sleep in the following positions | Side, back, stomach |
The Nectar customer experience
- Trial period: 365 nights
- Shipping: Free
- In-home setup and mattress removal: $199
- Warranty: Lifetime
Customer service
You can reach Nectar customer service by:
- Phone: Call 888-863-2827, available seven days a week, 24/7
- Email: support@nectarsleep.com
- Chat: Live chat available seven days a week, 24/7
To learn more about the Nectar customer experience, see our Nectar mattress review.
Helix Midnight Luxe: Best King-Size Mattress for Neck Pain
We chose the Helix Midnight Luxe as our best king-size mattress for neck pain. It has great pressure relief on all major pressure points we test, especially for back sleepers. The Midnight Luxe was also our best mattress of 2026.
- Excellent pressure relief during testing
- Impressive motion isolation
- Doesn’t retain heat
- Our pain relief score: 4.21/5
- Accessibility score: 4.06/5
- Mattress type: Hybrid
- Brand’s firmness rating: 6/10
Pros
- Strong edge support
- Cooling
- Responsive for ease of movement
- Tested well for pain relief
Cons
- Too firm for some testers
- Bulky to move
- Shorter trial period
Why our testers chose the Helix Midnight Luxe as the Best King-Size Mattress for Neck Pain
We named the Helix Midnight Luxe our Best King-Size Mattress for Neck Pain. Our testers of various sizes tried popular sleeping positions to test for pressure, especially on the back and neck. “My body feels pretty well supported all over,” said one of our higher weight sleep testers. They went on to recommend the Helix Midnight Luxe, especially for side and back sleepers. “This mattress hugs me gently. It feels firm, but not like I’m lying on a hard, flat surface,” said another tester.
The pain relief score for the Helix Midnight Luxe was an impressive 4.21/5, one of the highest scores in our testing. This score reflects the bed’s great pressure relief, which our testers rated a 4 out of 5 for all positions. The biggest drawback of the Helix Midnight Luxe was motion isolation, where it scored a 3 out of 5. “I could feel her getting in,” one tester said of their co-sleeping partner. “Switching positions felt more obvious. I felt the initial motion.”
In our March 2025 sleep pain and position survey, neck pain was one of the most common conditions mentioned.1 If you, like those survey respondents, experience chronic neck pain, the Helix Midnight Luxe might be the king-size mattress for you.
Who is the Helix Midnight Luxe right for?
The Helix Midnight Luxe can help relieve neck pain whether you sleep on your back, side, or stomach. Our testers thought it performed well for pain relief and for cooling. But the one thing the Helix Midnight Luxe cannot do is prevent you from noticing when your partner moves at night.
| I may love it if I: | |
| Sleep with a partner | No |
| Have chronic pain | Yes |
| Feel hot at night | Yes |
| Have mobility concerns | Yes |
| Sleep in the following positions | Side, back, stomach |
The Helix customer experience
- Trial period: 120 nights
- Shipping: Free shipping
- In-home setup and mattress removal: $159
- Warranty: Limited lifetime
Customer service
You can reach Helix customer service by:
- Phone: Call 831-777-5976, available Monday through Friday from 10 a.m. to 6 p.m. ET
- Text: Texting HELIX to 67069, available Monday through Friday from 10 a.m. to 6 p.m. ET
- Chat: Live chat via the bottom right corner of the website, available seven days a week from 10 a.m. to 10 p.m. ET
- Email: help@helixsleep.com
- Website: Submit a contact form
To learn more about the Helix customer experience, see our Helix mattress review.
Leesa Sapira Chill: Best King-Size Mattress for Side Sleepers
Our side-sleeping testers raved about the pressure relief on the Leesa Sapira Chill, scoring it a 5 out of 5. “I honestly love this mattress,” said a tester. “It’s so comfortable and supportive, and it’s a treat to lie down on at the end of the day.”
- Great for all sleeping positions
- Solid pressure relief
- Excellent motion isolation
- Our pain relief score: 4.78/5
- Accessibility score: 4.58/5
- Mattress type: Hybrid
- Brand’s firmness rating: 6/10
Pros
- Luxurious, plush topper
- Good edge support
- Handles for portability
- Highly responsive
Cons
- High mattress height may be challenging for some
- In-home setup and old mattress removal cost extra
Why our testers chose the Leesa Sapira Chill as the Best King-Size Mattress for Side Sleepers
Our testers loved how the Leesa Sapira Chill felt. They loved the topper, the sinkage, and the support. “I think my favorite thing about this mattress is the sinkage—you sink right through the comfort layer and it feels heavenly.”
You might assume that the same heavenly sinkage would make it hard to stand up out of bed. But the Leesa Sapira Chill scored a perfect 5 out of 5 on both seated edge support and lying edge support. One tester reported: “You turn very easily, and it feels good changing positions. I’m not sinking in too much, and I am able to shift quickly without feeling like I am pulling my body out of a divot.”
Who is the Leesa Sapira Chill right for?
The Leesa Sapiria chill offers cooling properties and a perfect 5/5 on edge support (not to mention a 4/5 on motion isolation). Our testers found that this bed could work for a wide variety of people: co-sleepers, back sleepers, and hot sleepers. Though it's our Best King-Size Mattress for Side Sleepers, the Leesa Sapira Chill supports all sleep positions.
| I may love it if I: | |
| Sleep with a partner | Yes |
| Have chronic pain | Yes |
| Feel hot at night | Yes |
| Have mobility concerns | Yes |
| Sleep in the following positions | Side, back, stomach |
The Leesa customer experience
- Trial period: 120 nights
- Shipping: Free
- Warranty: Limited lifetime
Customer service
You can reach Leesa customer service by:
- Phone: Call 844-335-3372, available Monday through Friday from 10 a.m. to 7 p.m. ET, and Saturday through Sunday from 11 a.m. to 7 p.m. ET
- Text: Text 877-548-5145, available Monday through Friday from 10 a.m. to 7 p.m. ET, and Saturday through Sunday from 11 a.m. to 7 p.m. ET
- Chat: Automated chat via the bottom left corner of the website, available 24/7. Live chat with a representative available Monday through Friday from 10 a.m. to 7 p.m. ET, and Saturday through Sunday from 11 a.m. to 7 p.m. ET
- Email: support@leesa.com
- Submit a contact form on the website
DreamCloud Classic Hybrid: Best Luxury King-Size Mattress
The DreamCloud Classic offers sleepers a luxurious feel at the lowest price on this list. It’s great for every sleep position, it’s cooling, and it suits those who sleep with a partner.
- Great responsiveness for combination sleepers
- Impressive cooling capabilities
- Hybrid design provides good pressure relief
- Our pain relief score: 3.88/5
- Accessibility score: 3.89/5
- Mattress type: Hybrid
- Brand’s firmness rating: 6.5/10
Pros
- Responsive surface
- High-quality cover
- Great pressure relief for all sleep positions
- Budget-friendly
Cons
- Poor edge support
- White-glove delivery costs extra
- No handles
Why our tester chose the DreamCloud Classic Hybrid as the Best Luxury King-Size Mattress
The DreamCloud Classic Hybrid earned our title of Best Luxury King-Size Mattress not for its price, but for its feel. The CloudQuilt cover and its cooling capabilities won over our testers. “This mattress is so comfortable,” said one tester, who marveled at the way the DreamCloud Classic Hybrid eased her back pressure. “I’m a stomach sleeper who doesn’t use a pillow, and this feels really natural to me. I need this mattress.”
The DreamCloud is a very responsive mattress, meaning the memory foam bounces back fairly swiftly after you lift your hand or move your body. This is helpful for combination sleepers who change positions throughout the night. “It was easy to switch positions,” said a tester. “I didn’t feel like the mattress was fighting me in any way. The mattress was a little more bouncy, which actually helped me switch positions.”
One of the biggest perks of this luxurious mattress is its price. The king-sized DreamCloud Classic Hybrid is under $1,000, and the least expensive bed on this list.
Who is the DreamCloud Classic Hybrid right for?
The DreamCloud Classic supports all sleep styles and relieves pressure for back and stomach sleepers. These features make it a good option for most sleepers.
| I may love it if I: | |
| Sleep with a partner | Yes |
| Have chronic pain | Yes |
| Feel hot at night | Yes |
| Have mobility concerns | Yes |
| Sleep in the following positions | Side, back, stomach |
The DreamCloud customer experience
- Trial period: 365 nights
- Shipping: White-glove delivery is $199
- Warranty: Limited lifetime
Customer service
You can reach DreamCloud customer service by:
- Phone: Call 833-237-3269, available seven days a week
- Chat: Live chat via the bottom right corner of the website, available seven days a week
- Email: support@dreamcloudsleep.com
To learn more about the DreamCloud customer experience, see our DreamCloud mattress review.
Saatva Classic: Best King-Size Mattress for Back Pain
The Classic is Saatva’s bestselling mattress for a reason: It’s known for how well it supports sleepers with back pain. And we’ve got the test results to back it up.
- Extra lower back support due to patented Lumbar Zone TechnologyⓇ
- Scored well in pressure relief
- Highest pain relief score of any mattress we tested
- Our pain relief score: 4.87/5
- Accessibility score: 4.55/5
- Mattress type: Hybrid
- Brand’s firmness rating: 6/10
Pros
- Excellent edge support
- Comfortable in multiple sleep positions
- Minimal sinkage
- Free white-glove delivery
Cons
- Could be too bouncy for some sleepers
- Less impressive motion isolation
Why our testers chose the Saatva Classic as the Best King-Size Mattress for Back Pain
Lower back pain was the most common condition our Sleep Pain and Position Survey respondents reported.1 What makes the Saatva Classic stand out as the Best King-Size Mattress for Back Pain is its 4.87/5 Pain Relief Score. This is the highest of any mattress we tested, and is extra impressive when coupled with its 4.55/5 Accessibility Score.
Multiple testers reported the Saatva Classic made them comfortable in positions they never normally like to sleep in, like on their back.
The Saatva Classic scored a 4.33/5 on edge support. “I have fallen off of mattresses in the past with bad edge support,” said one tester. “This one feels like it helps my body when standing out of the bed.”
The Saatva Classic is particularly good for people with mobility concerns. “I feel like the mattress helps move my body. When I rolled back over, I felt supported. I didn’t struggle or feel the need to use extra effort.”
Who is the Saatva Classic right for?
The Saatva Classic has a reputation for relieving back pain and pressure, but it’s not perfect. One key feature that makes the Saatva Classic great for movement (the bounce) means there isn’t much motion isolation. If you’re not a very light sleeper, this probably isn’t a dealbreaker.
| I may love it if I: | |
| Sleep with a partner | No |
| Have chronic pain | Yes |
| Feel hot at night | No |
| Have mobility concerns | Yes |
| Sleep in the following positions | Side, back, stomach |
The Saatva customer experience
- Trial period: 365 nights
- Shipping: Free white-glove delivery
- Warranty: Limited lifetime
Customer service
You can contact Saatva customer service by:
- Phone: Call 860-362-2641, available 24/7
- Email: info@saatvamattress.com
- Live chat: Available 24/7
- Calling or visiting a viewing room
To learn more about the Saatva customer experience, see our Saatva mattress review.
The WinkBed Luxury Firm: Best King-Size Mattress for Spinal Alignment
We recommend the WinkBed Luxury Firm for those with arthritis because of how well it performed in reducing pressure buildup and easing pain. The Luxury Firm is a hybrid, meaning it’s made with both an innerspring structure for support and memory foam for pressure relief.
- Great for all sleeping positions
- Excellent pressure relief
- Cooling topper is soft to the touch
- Our pain relief score: 4.20/5
- Accessibility score: 3.99/5
- Mattress type: Hybrid
- Brand’s firmness rating: 6.5/10
Pros
- Cooling
- Support without added pressure
- Accessibility-friendly
Cons
- A heavier mattress (135 pounds) with no white-glove delivery
- Average motion isolation
Why our testers chose the WinkBed Luxury Firm as the Best King-Size Mattress for Spinal Alignment
The WinkBed Luxury Firm scored 4.2/5 for pain relief, and with a brand firmness rating of 6.5/10, it’s primed for pressure relief. It’s our top pick for a king size mattress that supports spinal alignment. Our testers tried sleeping on their sides, backs, and stomachs to get a full picture. They paid special attention to whether their bodies felt aligned or under pressure while on the WinkBed.
Lighter-weight sleepers might need a pillow to fill the lumbar gap when back sleeping on the WinkBed. But one of our lighter-weight testers reported feeling comfortable on her stomach and said her hips didn’t sink in. For side-sleeping, she said, “My shoulders are pretty even with my hips; no pressure, but I still feel supported.”
The WinkBed Luxury Firm also scored high marks for cooling, netting a 4/5. “When I lie down, I can definitely feel the cushion/airflow keeping my back a little cooler,” said one tester.
Who is the WinkBed right for?
The motion isolation on the WinkBed Luxury Firm scored a 3 out of 5, so it may not work for light sleepers who share a bed. But most other sleepers may enjoy the WinkBed. People who sleep hot, change positions while sleeping, or have chronic pain will likely find comfort in the WinkBed.
| I may love it if I: | |
| Sleep with a partner | No |
| Have chronic pain | Yes |
| Feel hot at night | Yes |
| Have mobility concerns | Yes |
| Sleep in the following positions | Side, back, stomach |
The WinkBeds customer experience
- Trial period: 120 nights
- Shipping: Free shipping
- Warranty: Limited lifetime
Customer service
You can reach WinkBeds customer service by:
- Phone: Call 855-946-5233, available Monday through Friday from 8 a.m. to 7 p.m. ET
- Chat: Live chat via the bottom right corner of the website, available Monday through Friday from 8 a.m. to 7 p.m. ET
- Email: info@winkbeds.com
To learn more about the WinkBeds customer experience, see our WinkBeds mattress review.
Bear Elite Hybrid: Best King-Size Hybrid Mattress
Bear prides itself on making mattresses focused on recovery. As our Best Hybrid Mattress on this list, the Elite Hybrid combines memory foam and traditional springs. This design offers sleepers support and comfort.
- Quality materials
- Lots of bounce may benefit some sleepers
- Solid side-sleeping support
- Our pain relief score: 3.53/5
- Accessibility score: 3.53/5
- Mattress type: Hybrid
- Brand’s firmness rating: 6/10
Pros
- Excellent cooling
- Support for all sleep styles
- Responsive for easier movement
Cons
- Less impressive motion isolation
- Higher-weight sleepers may not feel as supported
Why our testers chose the Bear Elite Hybrid as the Best King-Size Hybrid Mattress
Bear’s entire mission is recovery, so some of its features support uninterrupted sleep. If changing positions while sleeping is challenging, the Bear Elite Hybrid might be a good option. The bed's high bounce makes for easier movement. “When I changed positions, my whole body did a little bounce,” said one tester. That extra bounce can be helpful for those who find certain movements difficult.
But a high bounce score often results in a worse motion isolation score. The Bear Elite Hybrid scored only a 2/5 for motion isolation. “This mattress is more firm and hard to push down on,” said a tester. That firmness offers extra spinal support, but it doesn’t absorb motion well. A partner getting in and out of the bed could be disruptive for light sleepers.
Who is the Bear Elite Hybrid right for?
Bear Elite Hybrid was cool to the touch and supported all sleep positions well. But it didn’t have strong motion isolation, so we can’t recommend it for light sleepers who share a bed.
| I may love it if I: | |
| Sleep with a partner | No |
| Have chronic pain | Yes |
| Feel hot at night | Yes |
| Have mobility concerns | Yes |
| Sleep in the following positions | Side, back, stomach |
The Bear customer experience
- Trial period: 120 nights
- Shipping: Free
- Warranty: Limited lifetime
Customer service
You can reach Bear customer service by:
- Phone: Call 844-311-0035, available Monday through Friday from 10 a.m. to 6 p.m. ET
- Email: support@bearmattress.com
- Chat: Live chat via the bottom right corner of the website, available Monday through Friday from 10 a.m. to 6 p.m. ET
To learn more about the Bear customer experience, see our Bear mattress review.
Silk & Snow Hybrid: Best King-Size Mattress for Back Sleepers
The Silk & Snow Hybrid is our Best King Size Mattress for Back Sleepers. While it worked well for all sleeping positions, it achieved its highest scores for back sleepers. Its foam-and-coil design helped testers feel supported through the back. Yet it still offered enough cushioning for pressure relief, while also cooling and isolating motion well.
- Gel-infused memory foam promotes cooling
- Solid motion isolation
- Minimal sinkage
- Our pain relief score: 4.09/5
- Accessibility score: 3.89/5
- Mattress type: Hybrid
- Brand’s firmness rating: 5/10
Pros
- Great edge support
- Responsive
- More affordable than many king-sized competitors
Cons
- Only mattress on this list without a lifetime warranty
- No handles
- No white-glove delivery
Why our testers chose the Silk & Snow Hybrid as the Best King-Size Mattress for Back Sleepers
The Silk & Snow Hybrid impressed our testers when back sleeping, earning the title Best King-Size Mattress for Back Sleepers. It features foam layers that contour to the body, supporting the lower back., Supportive coils keep the spine aligned. Even better? The Silk & Snow Hybrid is a highly affordable king-sized mattress.
Sometimes “affordable” means “cut corners.” We literally cut the corners off the Silk & Snow Hybrid to see what it was made of. What we found is a quality mattress for a fraction of the cost of some other beds in this roundup.
Our testers also appreciated the mattress’s cooling capabilities. “I didn’t notice it warming up while I was laying on it,” said one tester. “That’s a good thing, since I tend to run pretty warm when I’m sleeping.”
The edge support was another positive for the Silk & Snow. “I feel pretty supported lying down,” one tester said of the edge support for the Silk & Snow Hybrid. “I do feel the mattress giving in at my hip, but it’s not collapsing or making me feel unbalanced.”
Who is the Silk & Snow Hybrid right for?
As our most affordable king-size mattress, the Silk & Snow Hybrid is a good option for those on a budget. The mattress scored well for partner sleeping, pain relief, and all sleeping positions. Plus, the Silk & Snow Hybrid is designed to help those who sleep hot.
| I may love it if I: | |
| Sleep with a partner | Yes |
| Have chronic pain | Yes |
| Feel hot at night | Yes |
| Have mobility concerns | Yes |
| Sleep in the following positions | Side, back, stomach |
The Silk & Snow customer experience
- Trial period: 365 nights
- Shipping: Free
- Warranty: 15 years
Customer service
You can contact Silk & Snow customer service by:
- Phone: 1-877-672-2882
- Email: hello@silkandsnow.com
- Live chat: Available on the website
Calling or visiting a viewing room
Our process testing the best king-size mattresses
It’s important for our mattresses to support mobility, so we paid close attention to edge support. Did the mattress's build help us get off the edge as we sat, or did we sink? We also looked at pain-relieving features like pressure relief and bounce.
Pain relief
Pain relief is a weighted combined score based on how well each mattress bounced and relieved pressure. It also accounts for edge support in both lying and sitting positions.
Pressure relief
Using a thermal imaging pressure mat that projects data onto a map, we had our testers lie down on their backs, their stomachs, and both sides. Mattresses that scored well on pressure relief would appear blue on the thermal image. Mattresses that didn’t relieve pressure—or caused pressure—would turn the thermal map red.
Spinal support
We tested spinal support by evaluating mattresses for how well they contoured to our testers’ bodies. A mattress with good lower back support would align the testers’ spines into neutral positions.2 A good mattress for spinal support strikes a balance between firmness that keeps your spine aligned and enough give to contour to your body.
Firmness
First, we tested firmness by measuring sinkage. Next, we tested mattress support across all sleeping positions. Did our testers feel pressure or sinkage where they shouldn’t? Studies show that medium-firm mattresses best promote comfort and sleep.2 If your mattress is too hard, it can lead to contact pressure that can magnify any existing health problems.3
Sleeper weight
Weight can affect your sleep simply because it changes your relationship with your mattress. If you’re a lighter weight sleeper, firm mattresses that support the spines of heavy- and standard-weight sleepers won’t support you the same.
Likewise, higher-weight sleepers may find they sink too much on a bed that helps lighter weight sleepers with joint pain. For this reason, our testing team has a range of shapes and sizes.
What is or what is considered a king mattress?
A king mattress measures 76 inches by 80 inches. California king mattresses are even bigger, at 72 inches by 84 inches. Meanwhile, a split king mattress is not actually a king at all—it’s two twin mattresses side by side. Not sure you need a king? Take a look at our guide on choosing the best mattresses for your sleep needs.
How to choose a king mattress
There are quite a few factors that go into choosing a king mattress, once you’ve determined a king is the correct size for your needs. Given that most people opt for a king-size mattress because they sleep with a partner, motion isolation should be top of mind. Good motion isolation prevents you from stirring or waking up when your partner moves.
Hybrid construction
There’s a reason so many of the best king-size mattresses in this roundup are hybrids. Hybrid construction helps the mattress contour to your body. A hybrid mattress combines memory foam with the coils that come to mind when you think of classic innerspring mattresses.
The memory foam, usually in the topper, helps the bed conform to your body's contours. This helps with pressure relief, while the coils contribute to edge support and bounce.
Medium-firm to firm feel
Medium-firm is often a good mattress feel for spinal alignment, which is why the brand firmness of all the mattresses in this roundup does not exceed 6.5 out of 10.2
Cooling technologies
Many people choose a king-sized mattress because they sleep with a partner. So a bed that doesn’t reflect their partner’s body heat back at them is a benefit. Some of the hybrid mattresses on this list use breathable coils to provide cooling. Others, like the Silk & Snow, use gel-infused foam in the toppers.
Edge support and motion isolation
Edge support is important. It can help propel you off the bed to get from a sitting to standing position. It can also help keep you feel safely supported as you sleep close to the edge of the bed at night.
Trial periods and warranties:
All of the mattresses on this list have a trial period of 120 nights or longer. Trial periods are important when purchasing a mattress, because you can’t test for a good night’s sleep at a showroom. Warranties allow you to get a replacement mattress if an element breaks or is defective within the warranty period.
How much do the best king mattresses cost?
The best king-size mattresses in this roundup cost between $800–$2,800. King-size mattresses usually cost anywhere from $300–$500 more than queen-size mattresses from the same brand. For some brands, delivery is available, but it can cost extra. Other brands provide free white-glove delivery service. Yet more brands require you and a minimum of one other person to open a pressurized cardboard box.
Comparing the cost of the best king mattresses in 2026
| Comparison Features | Nectar Classic Memory Foam |
Helix Midnight Luxe |
Leesa Sapira Chill |
DreamCloud Classic Hybrid |
Saatva Classic |
WinkBeds |
Bear Elite Hybrid |
Silk & Snow Hybrid |
|---|---|---|---|---|---|---|---|---|
| Cost for a queen | $689 |
$2,648 |
$2,399 |
$649 |
$2,179 |
$2,570 |
$2,284 |
$975 |
| Cost for a king | $899 |
$3,173 |
$2,689 |
$849 |
$2,679 |
$2,856 |
$2,712 |
$1,235 |
| Shipping costs | Free |
Free |
Free |
Free |
Free |
Free |
Free |
Free |
| White-glove delivery available? | No |
Zip-code-dependent, additional cost |
Yes |
No |
Yes |
Yes, for an additional cost |
No |
No |
| Warranty length | Lifetime |
Lifetime |
Lifetime |
Lifetime |
Lifetime |
Lifetime |
Lifetime |
15 years |
| Return fees | Free |
Free |
Free |
Free |
$99 |
Free |
Free |
Free |
*Most mattress brands run frequent or ongoing promotions. Sale prices are typically lower and may change often.
Frequently asked questions
What are the dimensions of a king-size bed?
A king-sized mattress is 76 inches by 80 inches.
What is the difference between a standard king and a California king?
The difference between a standard king and a California king is about four square inches. King-sized mattresses are 76 inches by 80 inches, and a California king is 72 inches by 84 inches.
Do all mattress brands make a king-size mattress?
Most modern mattress brands make a king-sized mattress, if only to stay competitive.
Questions? Email us at reviewsteam@ncoa.org.