Best King-Size Mattress (2025): Based on 330 We Tested 

Memory foam is one of the most popular materials used in mattresses due to its slow-moving, hugging sensation. If you’re looking for that type of feel in your new king-size mattress, look no further than the Nectar mattress, an all-foam, medium-firm bed that comes with free shipping, a lifetime warranty, and a 365-night sleep trial. Due to its all-foam construction,  we weren’t surprised to find 4.5-star pressure relief on the Nectar. We also found an incredible amount of support from this bed, which led us to give it the full 5 stars for that category in our testing.

The Nectar mattress is made with CertiPUR-US certified foams, meaning they’re free from harmful chemicals, ozone depleters, and heavy metals. The comfort layer and transition layer add a nice amount of cushioning, yet are balanced by the denser support foam below. This gives the bed an overall medium-firm feel that our testers rated 6.5 out of 10 on our mattress firmness scale, where 1 is the softest and 10 is the firmest. 

When it comes to pressure relief, the memory foam Nectar mattress excels, which we discovered when we tested it using our pressure-sensing mat. As you can see below, the thermal map is mostly blue with just a touch of green when we lay on it on our backs, indicating low pressure. Our tester Nichole Mondshein said, “I think the Nectar does a great job relieving back pain, especially for back sleepers.” We do see a bit more green and yellow when side sleeping, indicating a rise in pressure. While this may not be concerning for most side sleepers, those with sensitive shoulders may want a bed that’s slightly softer.

Although memory foam has a reputation for trapping heat, we think the Nectar is one of the best beds on the market for cooling. The mattress cover is breathable, and the gel-infused memory foam helps draw heat away from the body. To test this, we used a thermal gun. First, we recorded the initial temperature of the mattress. Then, we recorded the temperature after someone had rested on it for 5 minutes. The Nectar only heated up 5.9 degrees, which we consider good temperature regulation, so we gave it a cooling score of 4.5 stars.

One thing to keep in mind is the Nectar’s motion isolation score, which we gave 3.5 out of 5 stars. While this score isn’t terrible, it does leave some room for improvement. If you sleep with another person, you’re likely to feel their movement at night — even from the other side of a king-sized bed. This may be an issue if you’re a light sleeper.

To learn more about the Nectar, read our full Nectar mattress review. For a bed with less motion transfer, try the Nolah Signature or check out our best memory foam mattress roundup.

Helix offers a line of six hybrid mattresses that vary in firmness level and feel. Each of these beds are sold in both a standard and luxury model. If you’re looking for a luxury king mattress, we recommend the Helix Midnight Luxe. Like the standard Helix Midnight, the Midnight Luxe has a medium feel that offers both pressure relief and support. We gave the Helix Midnight Luxe 5 stars for pressure relief and 4.5 stars for support, giving it a balanced feel that prioritizes comfort and spinal alignment. However, the Luxe offers some unique features that you won’t find in the standard model.

Unlike the standard model, the Helix Midnight Luxe includes a premium cooling pillow-top layer quilted with gel foam, which provides some added pressure relief and temperature regulation. There’s also an extra layer of foam under the comfort layer made from copper gel memory foam. Copper and gel are two great cooling infusions that help prevent overheating. Beneath those layers, the Luxe packs in more than 1,000 individually wrapped support coils. These innerspring coils are zoned to be softer or firmer depending on which part of the body they’re supporting.

Taking a look at the Helix Midnight Luxe’s pressure map, we found stellar results. The body is primarily blue in both the side- and back-sleeping positions, revealing little to no pressure, so we think this bed could be a good fit for both back and side sleepers. Our tester Nichole Mondshein is an average-weight back sleeper and said, “I definitely felt the lower lumbar spine support instantly when testing this mattress. The lumbar support helped with my chronic back pain. My hips and lower back were sinking into the mattress, but I still felt cushioned by the bed, and I was incredibly comfortable.” We think the Luxe’s pressure relief could help reduce pain in the back, hips, and shoulders, which led us to give it 5 stars in this category.

While back and side sleepers can find a lot to love from this bed, we don’t recommend it to stomach sleepers. The Luxe is a bit too soft to properly support and lift the hips in this position. If the hips aren’t lifted in line with the shoulders, the spine can bend unnaturally, leading to pain. We’d steer stomach sleepers towards a firmer mattress.

Interested in the Midnight Luxe? Read our full Helix Midnight Luxe mattress review. For a better option for stomach sleepers, try the Helix Dawn Luxe or head over to our best luxury mattress roundup.

If you’re a sleeper who struggles with back pain, you should try a king-size mattress that offers plenty of support. Our chief medical advisor Dr. Raj Dasgupta says a bed can help with back pain by providing enough support to keep the spine aligned, which reduces muscle strain. It also helps with weight distribution to relieve pressure on the back, he adds. With not one, but two layers of supportive coils, the Saatva Classic is a great choice. Our expert testers gave this mattress 5 stars in both the support and edge support categories, meaning it supports the spine at every turn. The Saatva also earned 4.5 stars for pressure relief, so you should find some cushioning relief at the back as well. 

We were also impressed by this bed’s double-coil construction, which led us to give it 5 stars for materials. One coil layer helps with spinal support, but two coil layers make for a super-supportive bed that props the hips in line with the shoulders. Our tester Nichole Mondshein said, “I found the Saatva Classic to be a bouncy, high-quality mattress with durability and great edge support. The coil-on-coil construction helps with support and spinal alignment, making this a good option for sleepers with back pain.”

While support is a crucial factor to pay attention to, pressure relief is equally important when it comes to back pain. The Saatva comes in multiple firmness options; we tested pressure relief on the Luxury Firm model, which falls at a 6.5 out of 10 on the mattress firmness scale. Taking a look at the pressure map, we see mostly all blue when back sleeping, indicating zero pressure buildup. For side sleeping, there’s only a bit of green at the hips and shoulders. Most side sleepers should be comfortable on the Luxury Firm model, but those with hip and shoulder pain may want to try the softer Plush model.

Two layers of coils make for 5-star responsiveness, or how fast a mattress responds to your movements, which means it’s easy to move around on this bed. However, this level of bounce brings down its motion isolation score, which is only a 3 out of 5. As an innerspring bed, this mattress doesn’t have many layers of foam to absorb motion on impact and prevent it from affecting the sleeper on the other side of the bed. This could be an issue if you sleep with a restless partner.

For more about the Saatva, read our full Saatva Classic mattress review. For a bed with a bit more foam, try the Saatva Rx or check out our best mattress for back pain roundup.

If you can’t decide between a supportive innerspring mattress and a cushiony foam one, you may enjoy a hybrid mattress. These beds combine the strong, supportive coils from innerspring beds with the plush cushioning of memory foam. We think the DreamCloud Original mattress is the best hybrid king-size mattress because it earned 4.5 stars in both support and pressure relief. We also appreciate the 5-star warranty and generous sleep trial period, which allows you to try the bed for a full year before you commit to its lifetime guarantee.

When we tested the DreamCloud for pressure relief, we found impressive results due to the top layers of cushioning foams. In the back-sleeping position, the map displayed primarily blue along the entire body, indicating minimal pressure buildup. When our tester Bridget Chapman tried this mattress, she found a lot of tension relieved at her lower back.

“As I sank into this bed, I could feel its top layers of foam filling in the space at my lumbar region for some pleasant pressure relief,” she said. We see more green forming when side sleeping and just a touch of yellow at the hips. Because of this, we wouldn’t recommend this bed to side sleepers with hip pain. However, if you’re a side sleeper who prefers a firmer feel, then the DreamCloud could be a good fit.

The DreamCloud’s main support system is a base layer of tall, individually wrapped coils that provide firmness and a bit of bounce. These coils provide a feel that’s slightly firmer than medium firm, falling at a 7 out of 10 on the firmness scale. When our experts tested this bed, they found a lot of lift, which had them feeling more “on” the bed than “in” the bed. They found enough support to keep their hips in line with their shoulders, thus achieving proper spinal alignment.

Although this bed is firmer than average, we still don’t think it’s firm enough for stomach sleepers, who need even more support at their hips. Lightweight stomach sleepers weighing less than 130 pounds may feel supported, but average-weight and heavyweight stomach and combination sleepers will likely find too much sinkage at their hips.

For more on the DreamCloud, read our full DreamCloud Original mattress review. For a better option for stomach sleepers, try the Titan Plus or see some more hybrid options on our best hybrid mattress roundup.

If you sleep with a partner, a king-size mattress can give you both the extra space you need. And when it comes to finding a specific bed, our tester Nichole Mondshein said, “I’m confident that couples should find everything they need in the WinkBed, including cooling features, responsiveness for sex, exceptional motion isolation, and plenty of edge support.”

Cooling is important for couples because two bodies heat up quicker than just one. Motion isolation is key to help you avoid the effects of your partner tossing and turning at night. And good edge support and responsiveness allows both partners to fully spread out while also making it easier to move around and reposition during sex. We think the WinkBed is a great king-size bed for couples because it earned 4 stars or higher in all of these key categories. 

Motion isolation is one of the most important elements for couples, especially if one or both of you sleeps lightly. If you’re asleep on one side of the bed, you don’t want to experience sleep disturbance from a restless partner on the other side. We test motion isolation using three tests, which you can read more about in our buyer’s guide at the end of this article. When we tested the WinkBed’s motion isolation, we found better results than expected for a bouncy hybrid mattress. The disturbance shown on our seismograph isn’t too concerning — we think you’re unlikely to feel a partner tossing and turning beside you.

We also found great temperature regulation on the WinkBed, and gave it 4.5 stars for cooling. The tall layer of coils adds plenty of space inside the mattress for hot air to flow without getting trapped. We also appreciated the Tencel cooling cover and gel-infused foam that draws heat away from the body. To put numbers to our cooling assessment, we measured the bed’s temperature with a thermal gun before and after a tester lay on it for 5 minutes and found just a 7-degree temperature increase, which we qualify as good cooling. While the WinkBed’s surface isn’t necessarily cool-to-the-touch, it should help prevent couples from overheating. 

We found strong edges on the WinkBed, so you and your partner should be able to fully spread out and use the entire surface of the bed. We also appreciated the bounce and responsiveness, which makes it easy for combination sleepers and sexually active couples to move around. While these factors are ideal for couples, we do want to note that this bed may not provide enough sinkage and contouring for strict side sleepers.

For a closer look at this bed, read our full WinkBed mattress review. For a better option for side sleepers, try the Nolah Original 10” mattress or check out our best mattress for couples roundup.

If you describe your perfect king-size mattress as “not too firm, but not too soft,” then you may enjoy the balanced feel of a medium-firm mattress. The Silk & Snow Hybrid mattress falls at a 6.5 out of 10 on our mattress firmness scale, where 1 is the softest and 10 is the firmest. This is our standard for a true medium-firm feel. However, I should note that the mattress is available in two different firmness levels: Medium-Firm and Plush. We (obviously) tested the Medium-Firm version, so you can expect the Plush to be closer to a 6 or so on our firmness scale.

With a score of 4.5 stars in support and 4 stars in pressure relief, the Silk & Snow blends spinal support with cushioning comfort to create a comfortable sleeping surface. We were impressed that this bed isolates motion exceptionally well while still being bouncy and responsive, and gave it 4.5 stars for motion isolation and response, as well.

When we tested pressure relief on the Silk & Snow Hybrid, we also found good results, especially in the back-sleeping position. As you can see on the map below, the body is mostly blue when our tester lay on her back, which indicates little to no pressure building. We do see a bit of green at the hips and shoulders in the side-sleeping position, which means pressure is starting to gather there. However, this level of pressure isn’t concerning, so we still think this bed is a good choice for side sleepers. And if you have especially sensitive shoulders or hips, you can always opt for the Plush model.

The cushiony gel memory foam layer is balanced by a layer of coils below, which adds a lot of support to the mattress. These coils are zoned for support, meaning their firmness fluctuates depending on which part of the body they support. These coils help lift the sleeper up and prevent too much sinkage, which is ideal for achieving proper spinal alignment. Our tester Amelia Jerden said, “It is a great middle-ground firmness for those who don’t want an ultra-firm bed but also want to feel well supported.”

We want to note this bed’s edge support, which is just average. We only gave the edge support 3.5 stars because it’s not as secure as some other beds on the market. This could be an issue for sleepers with mobility issues who rely on strong edges to get in and out of bed.

For more on the Silk & Snow, read our full Silk & Snow Hybrid mattress review. For a bed with better edge support, try the Saatva Classic or head to our best medium-firm mattress roundup. 

If you sleep on your back, we recommend a medium-firm bed that offers pressure relief at the lumbar region while also being supportive enough to keep your spine in neutral alignment. Based off of our testing, we think back sleepers will be happy on the king-size Brooklyn Bedding Signature Hybrid. With individually wrapped coils and soft memory foam, the construction of this bed helped it earn 4.5 stars in both the support and pressure relief categories. When it comes to back sleeping, Sleepopolis Director of Sleep Dr. Shelby Harris recommends hybrid beds like this one that fall somewhere between the 5.5 to 7 out of 10 range on our firmness scale. When we tested this bed in the back sleeping position, we thought it was stellar.

The Signature Hybrid comes in multiple firmness options. We tested pressure relief on the Medium model, but it’s also offered in Soft and Firm models. We found the best results when sleeping on our backs. Taking a look at the pressure map below, we saw all blue across the body in this position, indicating no pressure building. We weren’t as impressed with the side-sleeping pressure map, which shows pressure beginning to form at the shoulders and a large hotspot at the hips. Tester Nichole Mondshein said, “While I did experience increased pressure around my hips and shoulders when lying on my side, the Signature Hybrid remains an excellent option for back sleepers and anyone seeking a true medium-firm mattress.

Back sleepers also need lots of support at the hips to ensure they are aligned with the shoulders. When we first lay down on the Signature Hybrid, we felt some comfortable sinkage from the top layers of foam. After a few minutes, we felt lift from the coil layer and found our spine being propped into the correct position. There’s also enough foam to fill in the space at the lumbar region, which helps prevent pain.

As I mentioned earlier, our testers don’t recommend this bed to strict side sleepers, especially those with hip or shoulder pain. We’d steer these sleepers towards the Soft model. Similarly, stomach sleepers should opt for the Firm model for additional support.

If you want to learn more about this bed, read our full Brooklyn Bedding Signature Hybrid mattress review. For an all-foam option, check out the Nectar Classic or head to our best mattress for back sleepers roundup.

Looking for a soft, cushiony king-size mattress that contours around your joints? Try the Nolah Evolution in the Plush model. This bed provides plenty of plushness and sinkage, which secured it the full 5 stars for pressure relief. Despite its soft feel, this mattress is plenty supportive, earning 4.5 stars in both the support and edge support categories. We also found lots of cushioning and support from the Luxury Firm model, which we tested here in the Sleepopolis studio.

When we tested the Luxury Firm Nolah Evolution for pressure relief, we found outstanding results. Taking a quick look at the pressure map, we see all blue when back sleeping, which indicates no pressure building. The side-sleeping position also looks good, with some green forming along the sides. Remember, green still indicates low pressure, so we think side sleepers will enjoy this bed. However, those with more sensitive joints may find even more pressure relief from the Plush model, which you can select at checkout.

This bed’s soft feel comes from Nolah’s proprietary AirFoam, which has the same feel and sinkage as memory foam, but was designed to be more breathable. This mattress has two comfort layers of this material, which work together to provide lots of cushioning around the body’s sensitive pressure points. These layers also contain cooling properties, such as a graphite infusion that draws heat away from the body. The layer of supportive coils also contributes to the soft feel and cooling, as the coils respond well to pressure and allow air to flow without getting trapped.

One thing to keep in mind is the Nolah Evolution’s price, which is a bit steeper than your average mattress. This bed might not appeal to shoppers on a strict budget, but Nolah often runs great sales, so you’re very likely to get this bed for cheaper.

Interested in the Nolah Evolution? Read our full Nolah Evolution mattress review. For a budget option, try the Helix Sunset or check out our best soft mattress roundup.

If you’re an athlete, you may be interested in Bear, a mattress company that markets their beds specifically for active folks. That means sturdy materials that can support musculature, advanced cooling features to help you relax after a long workout, and more.

The brand’s luxurious Elite Hybrid model is offered in Soft, Medium, and Firm firmness options, so you can choose the feel you prefer while still reaping all the benefits. We were especially impressed with this bed’s pressure relief, support, motion isolation, cooling, and edge support — the Bear Elite Hybrid earned 4.5 stars in all these categories.

At checkout, Bear offers a unique cooling cover made of Celliant for an extra charge. According to Bear, Celliant helps with muscle recovery by promoting blood flow, which it has verified in 10 peer-reviewed and published clinical trials. Bear claims that this material absorbs your body’s energy and then reflects it back to you to assist with muscle recovery. Although we can’t personally verify these results, our testers thought the Celliant cover felt cool-to-the-touch and helped prevent overheating.

When it comes to pressure relief, athletes can appreciate the cushioning foams that contour around the body’s natural curves. We tested pressure relief on the Medium model. As you can see on the pressure map below, there’s an overwhelming amount of blue along the body when back sleeping, indicating no pressure buildup. In the side-sleeping position, we see some small spots of green on the hips and shoulders.

Our tester Nichole Mondshein said, “I think the Bear Elite Hybrid is an excellent pick for most average-weight back sleepers. I felt really well-supported on this bed. My hips remained lifted the entire time and my body didn’t feel like it was sinking.” Most side sleepers should be comfortable on the Medium model of the Bear Elite Hybrid, but side sleepers with especially sensitive joints may be happier on the Soft model, which provides even more sinkage and contouring. 

If you’re a shopper on a budget, this mattress may not be the best choice, as it does run a bit pricey. However, you’re likely to get this bed for cheaper since Bear runs frequent sales and often offers discounts on their mattresses.

For more on the Bear Elite Hybrid, read our full Bear Elite Hybrid mattress review. For a more affordable option, try the Bear Original or read our best mattress for athletes roundup.

If you’re a hot sleeper who struggles to stay cool, we recommend the king-size Leesa Sapira Chill. As its name suggests, this mattress was designed with cooling materials to prevent overheating in hot sleepers and a construction that promotes airflow. We gave it 4.5 stars for cooling because we were extremely impressed with its performance on our cooling test. We also think this medium-soft bed provides a nice blend of spinal support and cushioning, so we gave it 4.5 and 5 stars for support and pressure relief, respectively.

When we consider cooling, we first look at a mattress’s materials and construction. Upon lying down, I noticed an immediate cool-to-the-touch sensation from the Sapira Chill’s cover, which Leesa says was designed to keep the skin at a comfortable 88 degrees. I found additional cooling from the thick layer of gel-infused foam. This bed also contains a layer of coils, which adds space inside the bed for air to flow without becoming trapped.

When I tested this bed with my thermal gun, I found great results. I first recorded the initial temperature of the mattress at rest, which was 68.1 degrees. Then, I lay on it for 5 minutes and recorded the bed’s temperature again, which was 73.1 degrees. The temperature only increased by 5 degrees, which we consider excellent cooling.

When we tested this bed for pressure relief in the side- and back-sleeping positions, I personally felt a lot of cushioning from the pillow-top layer, which filled in any gaps along my body. As you can see on the pressure map, the body is blue with just a touch of green in both positions. This indicates very minimal pressure buildup, which suggests this bed would be a good one for both side and back sleepers.

I didn’t find quite as much support in the stomach-sleeping position. I tested the Medium-Firm model, so I’d recommend the Firm model to stomach sleepers, as this will provide more lift at the hips and help with spinal alignment.

For more on this bed, read our full Leesa Sapira Chill mattress review. For a cooling option for stomach sleepers, try the WinkBed Plus or head to our best cooling mattress roundup. 

If you’re a sleeper who weighs more than 230 pounds, a king-size mattress can be a great way to get some additional space. But you’ll want to make sure it’s ultra-supportive with plenty of lift to combat sagging. When it comes to these sleepers, Dr. Raj Dasgupta recommends a mattress with thick, durable materials that has a medium to firm feel with reinforced edges. The Big Fig, which stands for “bigger figure,” is just that, as it was designed specifically for heavier sleepers. When we tested this bed in our studio, we found 5-star support that’s perfect for heavyweight sleepers, as well as 4.5-star pressure relief for added comfort. 

The Big Fig is incredibly supportive and was designed to support up to 1,100 pounds, or 550 pounds per side. This bed is very firm, falling at an 8 out of 10 on our mattress firmness scale. The outstanding support comes from a layer of individually wrapped coils. We also found a lot of support from the gel-infused latex foam comfort layer and three one-inch layers of high-density polyfoam. Our tester Bridget Chapman said, “When I added more weight and pressed further into the mattress, I began to feel the strong support and bounce of the Big Fig. I would definitely recommend this bed for heavier people, as its firmness offers optimal support for larger bodies.”

As I mentioned above, durability is an important factor for heavy sleepers. We create our durability score by averaging together our materials, support, edge support, and warranty scores. The 4-star materials, 5-star support, 5-star edge support, and 4.5-star warranty create a durability score of 4.6, making this an extremely durable mattress. We don’t think this mattress is prone to premature sagging, and it should be sturdy enough for heavy sleepers to use for many years to come.

Since this bed was designed for heavier folks, we don’t recommend it to lightweight and average-weight sleepers who weigh less than 230 pounds. It’s likely too firm for these sleepers, and they may not find enough sinkage and contouring, especially in the side-sleeping position.

To learn more about the Big Fig, read our full Big Fig Mattress review. For another heavyweight pick, try the Titan Plus Luxe or head to our full best mattress for heavy people roundup.