The best cooling mattress 2024: cool beds for hot sleepers
This year's best cooling mattresses, reviewed and ranked by sleep experts
Whether it’s hot summers or hot flashes, the best cooling mattresses will offer unparalleled temperature regulation, helping to keep you comfortably cool all night long. While all of the best mattresses will offer a certain degree of temperature regulation, we have rounded up the mattresses that boast the very latest in specialised cooling technology.
There’s more than one way to provide outstanding temperature regulation, whether it’s by harnessing the naturally cooling properties of organic materials, or thanks to the inclusion of cutting-edge cooling technology. But which method is best? As a team of certified sleep specialists and mattress testing experts, we are well placed to cut through brands’ lofty cooling claims and help guide you towards the best cooling mattress for you.
Specialist beds that deliver on their promises to dissipate heat and keep sleepers comfortably cool throughout the night will often command a higher price tag. However, we have carefully considered price as well as performance when compiling this guide. Of course, timing your purchase to coincide with mattress sales and major holidays — like the Memorial Day mattress sales in May — will help you buy your mattress at the best price. But first, here are our top recommendations for this year's best cooling mattresses, as selected by our mattress testers…
Best cooling mattress overall
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The Casper Wave Hybrid Snow has been discontinued in a huge brand relaunch and has been replaced with a new cooling mattress, the Snow Max Hybrid mattress. We’re in the process of reviewing the Snow Wave Hybrid to see if its new cooling credentials stand up to the original. In the meantime, there's still time to buy the Casper Wave Hybrid Snow in a massive 50% off clearance sale.
The best cooling mattress for most people is the Casper Wave Hybrid Snow. As Casper’s premium mattress, this is a bed that comes packed with cutting edge cooling technology as well as exceptional support. Contouring foam and springs combined with phase-changing, cool-to-the-touch QuickCool cover make the Casper Wave Hybrid Snow a dependable choice for particularly hot sleepers who want to keep cool without compromising on support.
The Casper Wave Hybrid Snow is crafted from six cooling layers; the top three layers aid temperature regulation, with the QuickCool Cover on top that's infused with phase-change material. Next, there's a thin layer of breathable, perforated foam coated in cooling gel, followed by another layer of perforated foam, this time with six heat-wicking bands spaced horizontally across the mattress to pull heat away from your body.
This is a mattress that combines temperature regulation with outstanding pressure relief, so next up is a memory foam layer which is divided into three zones to provide pressure relief to your shoulders, waist and lower back, and help align your spine. This, along with its 7 out of 10 rating for firmness, makes it a dependable choice for neck and back pain sufferers as well as hot sleepers.
There’s also low motion transfer, which is great news for couples and restless sleepers — so what are the drawbacks? It only comes in a medium firm. For this price, we would have liked to have seen more customizable firmness options so that it could appeal to a wide range of sleeping styles. Also, as a premium product, it comes at a premium price (an evergreen 30% off sale means that prices start at $2,166.50 for a Twin XL). However, we think the Casper Wave Hybrid Snow a worthwhile investment for those blighted by both back pain and overheating at night.
- Read more: Casper Wave Hybrid Snow mattress review
Casper Wave Hybrid Snow cooling mattress: <a href="https://target.georiot.com/Proxy.ashx?tsid=45724&GR_URL=https%3A%2F%2Famazon.com%2FCasper-Sleep-Wave-Hybrid-Queen%2Fdp%2FB09YVT83MF%2Fref%3Dsr_1_4%3Fcrid%3D1ZILUXUMB68YC%26dib%3DeyJ2IjoiMSJ9.WnaxtDRMwFqu4Dc8s_IhxoZrkNfgpCoIOmuomu0z5aKO8cNOnNlVoUhd6Hr9t6zY6vK-SuPsCm_tFn_nELx3QWp0wMa7bMyWlY1Q6iURYJ2paRguemuhuYhWvrhvurq51Xxbm14WJbIN_nAg50pkErS-fv03tvERUT7L7rS5-uY.pVlU_mcIiQWindjT75Qbw_dr8_LiFYvLRE4uVMWWyx0%26dib_tag%3Dse%26keywords%3Dcasper%252Bwave%252Bhybrid%252Bsnow%26qid%3D1710926833%26sprefix%3Dcasper%252Bwave%252Bhybrid%252Bsnow%252Caps%252C282%26sr%3D8-4%26th%3D1%26tag%3Dhawk-future-20%26ascsubtag%3Dhawk-custom-tracking-20" data-link-merchant="Amazon US"" target="_blank" rel="nofollow">from $3,095 $1,532 at Amazon
The Casper Wave Hybrid Snow offers specialist cooling technology and formerly sat at the top of Casper's impressive sleep suite. It has been replaced by the new Snow Max Hybrid mattress in a new brand relaunch, but you can still buy the Casper Wave Hybrid Snow in a huge 50% off clearance sale (for now). This means you can pick up a queen size Wave Hybrid Snow for just $1,753 (was $3,595). It's an incredible price for a specialist cooling mattress - but you'll have to be quick, this sale can't last forever.
Best budget cooling mattress
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The 12-inch high Cocoon by Sealy Chill is a reliable cooling mattress with impressive features for the lower price. It's available as an all-foam model and a hybrid – we tested the all-foam version, but as a rule hybrids will always sleep that bit cooler than even the best memory foam mattresses, because the springs create an extra bit of space for air to circulate.
The Cocoon Chill magic begins with a cover designed to remain cool to the touch during sleep. Beneath this are two layers of the brand’s Phase Change Material pressure-relieving memory foam, designed to dissipates body heat while adapting to your unique body shape and supporting your spine in various sleeping positions. It also provides a little of that 'sink-in' feeling but with that all-important spinal support.
In our tests, we found the Chill comfortable for most sleepers in most positions, although be aware if you're heavier in weight, you might sink through the memory foam layer and find it a bit too firm. The Cocoon Chill cooling mattress has a core layer made up of eight-inch pocketed coils, which will give this model a slightly bouncier feel. There are firmer coils around the perimeter to bolster the edges, meaning you can make use of every inch of your bed space.
The cooling here is excellent for the price. Our reviewers found the Chill to be noticeably better at regulating temperature than any other mid-range foam mattress they'd tested, and one of the most consistently cool mattresses they'd slept on. Note, however, that spending a bit more will yield better chilling features – if you have a slightly bigger budget, a good upgrade would be the Nectar Premier Copper at #5.
Cocoon by Sealy Chill: <a href="https://cocoonbysealy.sjv.io/c/221109/1070817/13725?subId1=hawk-custom-tracking&sharedId=hawk&u=https%3A%2F%2Fwww.cocoonbysealy.com%2Fmattress%2Fthe-chill-mattress%2Fv%2F119%2F" data-link-merchant="cocoonbysealy.com"" target="_blank" rel="nofollow">from $619 $399 at Cocoon by Sealy
You'll never pay full price for the Chill mattress – the evergreen <a href="https://www.tomsguide.com/deals/cocoon-by-sealy" data-link-merchant="tomsguide.com"" data-link-merchant="cocoonbysealy.com"">Cocoon by Sealy mattress sale knocks 35% off MSRP, which brings the price of a queen to an incredible $699. This is as cheap as we ever see this mattress for, and you'll get a free sleep bundle (including two memory foam pillows, a cotton sheet set, and a mattress protector) worth up to $199.
Best cooling mattress for couples
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The extra features in Nectar's Premier Copper mattress are designed for hot sleepers looking for an effective cooling mattress with a more affordable price. At 14" deep, the Premier Copper delivers big on comfort as well as temperature-regulation. In our tests, the polyethylene-and-copper blend cover and 4" top layer of gel memory foam infused with phase change materials did a great job of wicking away sweat and body heat and regulating sleep temperature, keeping our sleepers comfortably cool during the testing period. We found the top cover was cool to the touch, although not as dramatically so as the pricier GhostBed (#4) or Casper (#8).
Rated a 6 out of 10 on the firmness scale, the Nectar's Premier Copper cooling mattress is best suited to side sleepers. The surface adapts nicely to the contours of the body in this position, especially around the shoulders and head, reducing pressure and keeping the spine comfortably aligned. Stomach and back sleepers will likely find it a little unsupportive though, and would be better with something firmer.
The Premier Copper is more of an investment than the uber-popular original model (read about that in our Nectar mattress review), Note too that this mattress is the only model in our ranking to come with a full 365-night trial, which means you can try it out in every season before committing to keeping it. There's a forever warranty for added peace of mind, too.
- Read more: Nectar Premier Copper mattress review
Nectar Premier Copper mattress: <a href="https://nectar.xovt.net/c/221109/473932/8338?subId1=hawk-custom-tracking&sharedId=hawk&u=https%3A%2F%2Fwww.nectarsleep.com%2Fpremier-copper-mattress%2Ftwin" data-link-merchant="nectarsleep.com"" target="_blank" rel="nofollow">from $1,499 $999 at Nectar
Nectar's 33% evergreen mattress sale brings the price of a queen size memory foam Premier Copper down to $1,249. It's a good price, but one we're used to seeing. We have seen Nectar drop to 40% off during major sale events, so it could be worth bookmarking our <a href="https://www.tomsguide.com/deals/nectar-mattress-promo-codes" data-link-merchant="tomsguide.com"" data-link-merchant="nectarsleep.com"">Nectar mattress deal page to see if those levels of savings are recreated during the Presidents' Day mattress sales. Don't forget, Nectar also offer a very generous 365 night sleep trial.
Best cooling mattress for joint pain
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For something a little different, check out the Purple Original. Like all of this brand's beds, the original features a layer of 'GelFlex Grid'. This stretchy gel grid sits at the top of the mattress, and will contour to your shape for custom support. Thanks to the open structure, it won't trap body heat – which is an issue with many foams. In our review, we found the grid was temperature-neutral, and worked to ensure the mattress stayed at a cool, comfortable temperature all night long.
There's a slightly unusual sleep feel here: the grid feels squishy when pressed, but firm when you're lying down on it, with extra support seeming to concentrate exactly where it's needed, under the back and legs. It's much more responsive than traditional memory foam, too, and will spring back into shape immediately when pressure is removed. We found it super comfortable in all positions, but especially so for side and back sleeping.
This mattress excels when it comes to pressure relief (our testers describe it as giving a kind of floating sensation), and we rank it amongst the best mattress in a box models around for anyone with hip or back pain. The grid cushions the joints comfortably, while still offering the support required to keep everything aligned properly. Do note that it's the thinnest option in our list though, clocking in under 10". That will make changing the sheets easier, but you won't get the same luxe feeling as a chunkier option.
Price-wise, we're in the upper-mid price bracket here, but how much you'll pay does depend on when you buy. The best Purple mattress sales and deals knock $200 or more off, but it's hard to predict when they'll appear. The Nectar model at #5 sits in a similar price bracket, if you prefer the sink-in feel of traditional memory foam.
- Read more: Purple Mattress review
Purple Mattress: <a href="https://purple.pxf.io/c/221109/454867/8120?subId1=hawk-custom-tracking&sharedId=hawk&u=https%3A%2F%2Fpurple.com%2Fmattresses%2Fpurple-bed" data-link-merchant="purple.com"" target="_blank" rel="nofollow">from $999 $799 at Purple
You can't always get a discount on Purple's mattresses, but there's currently up to $400 off all sizes of the original mattress, with the largest savings reserved for the bigger mattress sizes. Right now, you can buy a queen size mattress for $1,099 which is one of the best <a href="https://www.tomsguide.com/news/purple-mattress-sales" data-link-merchant="tomsguide.com"" data-link-merchant="purple.com"">Purple mattress deals we've seen on this model.
Best smart cooling mattress
5. Eight Sleep Pod 3 cover
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Eight Sleep is the place to go if you want an ultra-smart cooling bed, and ultimate control over your nighttime temperature. The cover contains a network of water-filled tubes that can be cooled or heated to your exact preferences, between 55°F and 110°F – and you can even pick different temperatures for each half of the bed. You can buy the Pod with a mattress bundled in, but we'd probably recommend just going for the cover, and pairing it with a mattress that suits your needs. All the tech is in the cover, anyway – the mattress is just a standard mattress.
We're now on the third generation of Pods, and they're cleverer than ever. The dual-zone heating and cooling is just the start of it. One of our best smart bed picks, the Pod Pro 3 also monitors your nighttime habits (again, for each side of the bed separately) the same way a sleep tracker wearable would, to provide you with insights to help you improve how well you sleep each night. It'll track everything from sleep stages and duration to heart rate, HRV and more. And if you don't enjoy being woken up by an alarm, there's an in-built GentleRise alarm option that vibrates the cover at chest height for a more soothing (?) wake-up.
Eight Sleep Pod 3 cover: <a href="https://eight-sleep.ioym.net/c/221109/607198/9942?subId1=hawk-custom-tracking&sharedId=hawk&u=https%3A%2F%2Fwww.eightsleep.com%2Fpod-cover%2F" data-link-merchant="eightsleep.com"" target="_blank" rel="nofollow">from $2,195 $2,145 at Eight Sleep
Eight Sleep tend to be a little conservative with their discounts, and right now there's $50 off all sizes of the Pod 3 cover. We have seen discounts go as high as $500 during major sale events, so we would recommend holding out to see if the Memorial Day mattress sales in May bring prices down further.
Best cooling mattress for active lifestyles
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The Zoma Boost is a luxuriously thick, hybrid mattress aimed at those who live an active lifestyle. It also boasts some outstanding cooling powers. It kept our testers noticeably cooler during our review period, and they consistently woke up feeling refreshed after a night on this mattress. In particular, we liked the special cooling cover, which worked effectively to wick away body heat and remained cool to the touch throughout the night.
Elsewhere, the graphite memory foam cradles the sleepers' joints without trapping heat, and are responsive enough that you won't feel stuck in one position. A benefit that this mattress potentially has over the Ghostbed (#4) is that it has a coil layer. Springs boost breathability by creating space for air to circulate within the mattress.
At a 6 out of 10 on the firmness scale, the Boost is best suited to side sleepers, who will appreciate the excellent pressure relief here. Those who weigh above average may find it doesn't provide enough support, though. Another potential down-side to be aware of is that this mattress doesn't isolate movements especially well. This might not be the best choice for you if you're a particularly light sleeper or share a bed with a wriggler.
Factoring in both brands' regular sales, the Zoma Boost is basically the same price as the Ghostbed above. The Zoma is a couple of inches thicker – which might tip it into 'unweildy' territory for some – and has the added spring layer, discussed already.
- Read more: Zoma Boost mattress review
Zoma Boost Cooling Mattress: <a href="https://shareasale.com/r.cfm?b=91422&u=1338591&m=91422&afftrack=hawk-custom-tracking&urllink=https%3A%2F%2Fzomasleep.com%2Fmattresses%2Fzoma-boost" data-link-merchant="zomasleep.com"" target="_blank" rel="nofollow">from $1,349 $1,149 at Zoma Sleep, plus two free pillows
You can knock $200 off the price of a luxurious Zoma Boost right now. That takes the price of the queen size down to $1,549. It sounds like a hefty saving, but in fact it's a pretty standard offer from Zoma. However, you won't ever see it cheaper. Plus, right now Zoma are throwing in two free pillows worth $200 with mattress purchase.
Best cooling mattress for side sleepers
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The GhostBed Luxe boasts some incredible cooling powers. This 13-inch tall mattress is constructed with seven individual layers of cooling and comfort elements, creating a cool yet cradling effect along your body.
The GhostBed Luxe cooling mattress has a top layer made from 'Ghost Ice' fabric, which, as claimed, remains cool to the touch (this is unusual, in our experience). That’s followed by one inch of cooling fiber, then one inch of gel memory foam. The Ghost Ice Layer features patented thermo-sensitivity technology designed to sense heat while you sleep and adjust the mattress to keep you cooler. In our tests we gave this mattress full marks for temperature regulation – the airflow was terrific, and our temperature remained comfortable and cool at all times.
This model has a softer sleep surface that cradles and contours to your body, making this one of the best mattresses for side sleepers, who need a little extra give around the shoulders and hips to keep things comfortable in this position. However, back and front sleepers, as well as heavier people, should consider something a bit firmer for better spinal support. Keep in mind, too, that the firmness of the GhostBed Luxe is affected by room temperature – so it may feel firmer in the wintertime and softer in the summertime.
The plush sleep surface absorbs movements extremely well, making the Luxe a great choice for couples or restless sleepers. This is paired with excellent edge support. so you can spread out and use every inch of the bed as you wish.
The GhostBed Luxe sits in the premium bracket (you can ignore MSRP as it's never sold at full price). It's typically the same price as the Zoma Boost above – that one is thicker and includes a layer of springs. If the Ghostbed is too expensive for you, check out the Nectar at #5, or if you're ready to invest a bit more, the specialist models at #8 and #9 yield unbeatable cooling tech.
- Read more: GhostBed Luxe mattress review
GhostBed Luxe Cooling Mattress: <a href="https://ghostbed.3uu8.net/c/221109/577565/9556?subId1=hawk-custom-tracking&sharedId=hawk&u=https%3A%2F%2Fwww.ghostbed.com%2Fproducts%2Fghostbed-luxe" data-link-merchant="ghostbed.com"" target="_blank" rel="nofollow">from $2,595 $1,298 + 2 free pillows at Ghostbed
The GhostBed Luxe is never sold for MSRP – there's a permanent evergreen 50% off deal. This brings the price of a queen size GhostBed mattress down to $1, 548 from $3,095. It's a saving we're used to seeing, but you won't see it bettered.
Best cooling mattress for night sweats
8. Tempur-Pedic Tempur LUXEbreeze
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The Tempur-Pedic LUXEbreeze is the best cooling mattress for very hot sleepers as it guarantees to feel up to 10 degrees cooler than comparable Tempur beds. This brand is known for making some of the best luxury mattresses around, but they do come at a cost, and the LUXEbreeze is the priciest model in our roundup, by some margin.
For that price you can expect a truly excellent mattress though. On the top sits a zip-off SmartClimate cover designed with cooling fibers, meaning it instantly feels cool against your skin. There’s also a layer of Tempur PureCool and phase change material to absorb extra heat and humidity, and to promote better airflow. (The more freely air flows within your mattress, the cooler it will be.) That’s followed by a pressure-relieving ventilated layer sat on a breathable base for enhanced pressure relief across your back, neck and hips.
The Tempur LUXEbreeze comes in your choice of soft or firm. The soft version is good for side sleepers, those who want a plush feel, and for people with a lighter bodyweight. The firm version is recommended for back sleepers, heavier sleepers, people with low back pain, and those who just enjoy sleeping on a firm mattress. Both the soft and firm LUXEbreeze have attracted good user reviews for motion isolation, so your partner shouldn’t wake you up when they get in or out of bed.
Speaking of user reviews, the LUXEbreeze has an average rating of 4.5 out of 5 stars, generated from nearly 1,000 user reviews as of January 2023. Customers praise its pressure relief abilities in all sleeping positions, as well as how cool to the touch it remains throughout the night. Some users complained that their mattress took a few weeks to break in and that edge support is lacking, but not everyone agreed on this. We haven't had a chance to test this one out yet, but you can check out our Tempur-Pedic Tempur-Adapt mattress review for a taste of what to expect from this brand.
Tempur-Pedic mattress sales and deals don't happen super often, but if you do spot one they're well worth taking advantage of. The extras are a bit of a mixed bag here: if you buy direct from the brand, you'll get free white glove delivery in 48 states, but the trial period is the shortest in our ranking at just 90 days.
Best cooling mattress for RV use
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The Brooklyn Bedding Aurora Luxe ticks a lot of boxes; it's available in three different firmness options, we found it delivered excellent support and comfort in our tests, and the cooling features work reliably well. While the cooling powers can't rival the premium or specialist options in our ranking, this mattress hits the sweet spot when it comes to balancing performance and price.
There are a few different cooling features at play here. The GlacioTex cooling cover removes excess heat from the mattress’ surface and remains cold to the touch – in our tests we found it worked effectively, although it has a smooth weave that will make your mattress a little slippery, so your fitted sheet (and indeed you) may have trouble staying put.
The foams used are designed specifically not to help, not hinder, temperature regulation. Finally, there's a spring layer, which provides space for air to circulate within the mattress, boosting breathability (we rate this amongst the best hybrid mattresses around). In our tests we found these features all worked together well to keep the mattress at a comfortable temperature every night,
The Brooklyn Bedding Aurora Luxe Hybrid also performed well on the comfort front. The ability to pick your firmness means you can tailor it to ensure it's comfortable and supportive for your body type and preferred sleep position. The coils are zoned to provide extra firmness in the central third, beneath your lumbar.
However, where this mattress really comes into its own is the wide range of sizes available, including RV king and RV bunk, which makes it a decadent addition to your motor home.
There are a couple of potential down-sides to be aware of: we found the off-gassing was some of the worst we'd experienced (although people's experiences with this tend to vary), and the motion transfer was below average, too, which means this won't be a great choice if you're a particularly restless sleeper, or share a bed with one.
- Read more: Brooklyn Bedding Aurora Luxe mattress review
Brooklyn Bedding Aurora Luxe Hybrid:<a href="https://brooklynbedding.pxf.io/c/221109/1172830/14792?subId1=hawk-custom-tracking&sharedId=hawk&u=https%3A%2F%2Fbrooklynbedding.com%2Fproducts%2Fbrooklyn-aurora-hybrid%3Fvariant%3D32592681435181" data-link-merchant="brooklynbedding.com"" target="_blank" rel="nofollow"> from $1,199 $899.30 at Brooklyn Bedding
Brooklyn Bedding currently has 25% off mattresses if you enter the promo code WINTERY25 at the checkout. This drives the price of a queen down to $1,698.80. While this is a good price, it doesn't quite match the 30% discount we saw last month. If you can wait, we'd recommend waiting for the Memorial Day mattress sales in May to get the best possible price.
How we test the best cooling mattresses
The Tom’s Guide mattress review process is editorially independent, which means that it isn't influenced by third parties. Our expert mattress testers sleep on each mattress for at least three weeks (roughly how long it takes for your body to get used to a new mattress) and spend hours scientifically testing the performance of each product.
Mattress firmness is subjective, so each lead reviewer also forms a trusted and experienced testing panel made up of people with different sleep needs and body types. We have side sleepers, back sleepers and stomach sleepers, with lighter, average and heavier bodies, who rate each mattress using a specific set of performance criteria.
Together, these processes enable us to produce accurate, well-balanced and data-backed mattress reviews, to help you decide whether the mattress you like the look of is the best choice for you. Read our full mattress methodology for more info.
Best cooling mattress FAQs
What are the benefits of a cooling mattress?
Sleeping cool helps you drift off quicker, as your body will be at the right temperature for sleep. If you naturally 'run hot', you might find yourself waking up in the night feeling sweaty and uncomfortable. Outside of a cooling mattress, keeping your bedroom at a sleep-friendly temperature of 65-72 degrees Fahrenheit will help you fall asleep faster and stay asleep for longer. Cooling mattresses are designed to dissipate heat and promote better airflow, to stop you from overheating at night.
Specialist cooling mattresses can be expensive, but if your sleep is disturbed most nights because you wake up feeling too hot, it could make a major difference to your health and wellbeing.
Aside from helping you to remain at the right temperature for sleeping, cooling mattresses have many of the same benefits as standard models: good pressure relief, support for your entire body, and they promote healthy spine alignment, protecting your posture during sleep (for the record, this is the best position to sleep in when it's hot).
We recommend only choosing a cooling mattress that comes on a risk-free trial basis. That way, you’ll get to put it to the test during the trial period to be sure that it really does help you sleep cooler. If not, you can return it during the trial for a refund.
When is the best time to buy a cooling mattress?
Although mattress sales happen all year round, and some of the models in our ranking will be permanently discounted, there are certain events that tend to deliver bigger savings. The very best time is at the end of November when the Black Friday mattress deals arrive and usually spill over into the Cyber Monday mattress deals.
Late November might not be the time of year when you're most in need of a cooling mattress, though. If you've missed the holiday sales, your best bet is to wait for another national holiday. We see many of the best cooling mattresses on sale for Presidents Day in February, followed by further prices drops to tie-in with the Memorial Day mattress sales. This is usually the last good time to pick up a cool bed for less before the summer, when prices tend to increase for a while (although do check our 4th of July mattress sales guide – you might get lucky).
What kind of mattress is best for hot sleepers?
At the most basic end of the spectrum, an innerspring or hybrid mattress will be more breathable than an all-foam one, as the coils create space within the mattress for air to circulate.
Memory foam can trap body heat. However, not all foams are created equal, and some foams will be much worse for this than others. (We explore this deeper in our featuring answering: Are memory foam mattresses hot?). You can't always trust brands' claims here – lots of brands add gel or copper into their foams, saying that it'll wick away body heat, but in practice it's unlikely such infusions will make any difference at all. The most reliable way to assess a mattress' cooling abilities is to read reviews from people who've slept on it.
Are cooling mattresses cold in winter?
Why you can trust Tom's Guide
Cooling mattresses aren’t refrigerators; they keep you cool by drawing existing surplus heat away from you. In fact, a lot of cooling materials, such as gel-infused foams, adapt to your environment and work in reverse. For example, PCMs work with fluctuating body temperature by absorbing heat and releasing it as the body cools. This means it can help you cool down when you get hot and warm up when you start cooling down.
Active vs passive cooling
In proper cooling mattress territory, you'll find models with technical fabrics in their upper covers, and foams geared specifically towards dissipating heat. That's known as passive cooling, and almost all the models in our best cooling mattress guide use this approach.
For ultimate chilling power, however, there are a handful of products on the market that offer active cooling. One is the Eight Sleep Cover, which contains water channels that can be heated or chilled to the exact temperature you prefer.
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Claire Davies is Tom's Guide's mattress expert and main sleep product tester with over 15 years' product review experience, and she is responsible for all mattress and sleep coverage on the site. A qualified journalist, Sleep Editor and Certified Sleep Science Coach, Claire writes about all things related to sleep, from mattress reviews to the latest sleep techniques and research. Claire has interviewed a wealth of experts, from mattress designers and innovators to neuroscientists and doctors of sleep medicine. Before taking on the role of Sleep Editor, Claire worked as Health & Wellness Editor at Top Ten Reviews, and before that was a Senior Content Editor at T3. Claire is super-passionate about how consistent, good quality sleep can boost our physical and mental wellbeing, and would love to hear from PRs and brands regarding sleep products, services and research that can help our readers sleep better than ever.
- Nicola AppletonSleep Features Editor
- Ruth HamiltonSleep Editor, Certified Sleep Science Coach