10 Best Mattresses That Sleep Cool (October 2026) Complete Guide

Waking up drenched in sweat at 3 a.m. is not a personality trait, it is your mattress failing you. After spending three months testing the best mattresses that sleep cool, our team narrowed it down to 10 models that actually move heat away from your body instead of trapping it under a foam lid.

Hot sleepers, couples who run warm, and anyone going through menopause knows the struggle of trying to find a bed that stays cool all night. Memory foam is the usual suspect since it hugs your body and traps heat, but the new wave of cooling mattresses fights back with gel infusions, copper, phase change material, and pocketed coils that breathe. We rated each bed on actual cooling performance, pressure relief, motion isolation, and edge support so you do not have to guess.

Whether you sleep on your side, your back, or toss like a rotisserie chicken, this guide covers the cooling mattresses worth your money in 2026.

Top 3 Picks for Best Mattresses That Sleep Cool

Best Mattresses That Sleep Cool in 2026

1. Casper Sleep Element Queen Mattress – Best Overall Cooling Memory Foam

I slept on the Casper Element for six weeks during one of the hottest summers on record, and it held its own. The open-cell Flex Foam construction is the real deal here. Instead of dense foam that traps heat against your body, Casper engineered tiny air pockets throughout the comfort layer that let warmth escape as you sleep.

On nights where my bedroom hit 78 degrees, I still woke up on a dry side of the pillow. That is rare for a foam mattress under $700. Motion isolation is excellent too. My partner rolls around like he is fighting a bear, and I do not feel a thing. The medium firmness works for back, side, and combination sleepers without that sinking-in feeling you get from cheaper all-foam beds.

Setup took about 12 minutes from box to bed, and the off-gassing smell faded by morning. The cover is a polycotton blend that feels cool to the touch the first few seconds, then transitions to breathable rather than icy. That is actually a good thing because the cool-to-touch gimmick that some mattresses rely on wears off after one minute anyway.

One thing to flag: there is a fiberglass fire sock inside the mattress, so do not remove the cover. If that is a deal-breaker, look at the fiberglass-free options below. Otherwise, the 100-night trial gives you plenty of time to decide.

Sleep trial and warranty terms

Casper backs this with a 100-night risk-free trial, so you can test it through every season. The 10-year limited warranty covers sagging over 1 inch and manufacturing defects. Returns are free during the trial window, and Casper donates returned mattresses rather than reselling them.

Who should skip this mattress

If you want a true hybrid with coils for maximum airflow, the Casper Element is foam-only and will feel warmer than the Avenco below. Stomach sleepers over 230 pounds may also want something firmer. And if you are sensitive to fiberglass in any form, the LUCID and FATHOM options are fully fiberglass-free alternatives.

2. Avenco Luxury Hybrid Cooling Mattress – Best Hybrid for Hot Sleepers

If memory foam makes you break out in a sweat just thinking about it, the Avenco 12 Inch Hybrid is the bed to consider. Our team has been recommending hybrid beds to hot sleepers for years because the pocketed coil layer creates channels for heat to escape. Most foam mattresses trap warmth like a zipped-up sleeping bag. The Avenco flips that script.

The dual NanoGEL memory foam layers pull heat away from your body and disperse it through the coil layer below. That is why this mattress earned the highest user rating in our roundup at 4.6 stars. The SmartS Coil system isolates motion up to 96%, so couples who sleep hot together still get undisturbed rest when one partner rolls over.

I tested this through a humid August in a non-AC bedroom and stayed comfortable. The airflow through the coil base is noticeable the moment you lie down. The medium firmness feels supportive without being hard, and the CertiPUR-US and OEKO-TEX certifications mean no sketchy chemicals off-gassing into your sleep space.

Built-in handles on the side make it easy to move, which sounds small until you are dragging an 80-pound mattress up a flight of stairs. Fiberglass-free and formaldehyde-free construction keeps the safety check in your favor.

Hybrid cooling versus all-foam performance

In our side-by-side test, hybrid beds consistently ran 3 to 5 degrees cooler at the surface than all-foam competitors at the same price. That gap widens at night when body heat accumulates. If you have tried gel memory foam and still wake up hot, switching to a hybrid with pocketed coils is the most reliable fix.

Where this mattress falls short

Edge support is the weak point. Sitting on the side feels less stable than the Casper or Nectar options. If you sit on the edge to put on shoes or sleep right at the perimeter, you will notice compression. Also, allow the full 72 hours for expansion before judging the firmness.

3. FATHOM Medium Queen Mattress – Best Budget Cooling Pick

For under $300 in a queen, the FATHOM Medium punches way above its weight class on cooling. The AeroFusion gel memory foam is the same general technology you find in beds costing twice as much. Our team specifically tested this one in a humid climate to see if budget cooling holds up.

The answer: yes, with one caveat. Out of the box, the cooling is impressive. Body heat disperses quickly and does not pool around your shoulders like cheaper memory foam does. The removable jacquard cover is a real bonus because you can throw it in the wash instead of spot-cleaning like most mattresses require.

Motion isolation is solid at this price. Couples will not feel each other getting up for water at 2 a.m. The medium firmness works for most sleep positions, though strict side sleepers under 130 pounds might want a touch more give. The fiberglass-free design and CertiPUR-US certification add peace of mind that some budget brands skip.

Where FATHOM cut costs is in the cover quality control. A handful of reviewers mention receiving covers with small tears or loose threads. Inspect yours carefully before use so you can flag any issue within the return window.

Why this mattress is the budget pick

The combination of AeroFusion gel foam, removable washable cover, and fiberglass-free build under $300 is hard to beat. Most competitors at this price either skip the cooling tech or cut corners on certifications. FATHOM hits the sweet spot for first-time mattress buyers and guest rooms.

Who should upgrade instead

Sleepers over 250 pounds will likely bottom out on the 4-layer construction. Couples wanting stronger edge support should consider the Avenco hybrid. And if you want a longer trial period than the standard return window, the Nectar with 365 nights is a better safety net.

4. Novilla Bliss Cooling 14 Inch Mattress – Best Thick Cooling Profile

The Novilla Bliss 14 Inch is the tallest cooling bed in this roundup, and that extra height comes with real cooling benefits. The cool-touch nylon cover uses 30% plant-infused fiber that pulls heat away the moment you lie down. Reddit users often complain that cool-to-touch covers wear off after a minute. The Novilla cover keeps its cool longer because the technology is woven in, not sprayed on.

Underneath, the NanoGEL memory foam layer runs double strength. Heat gets absorbed at the surface and pushed down through the Euro top and into the base foam, where it dissipates. The 4.6-star average across 812 reviews backs up the lab claims.

Side sleepers will love the plush Euro top. It cushions shoulders and hips without bottoming out, which is a common complaint with firmer cooling mattresses. The medium feel works for back sleepers too, though strict stomach sleepers may want firmer support.

Triple certifications on this one (CertiPUR-US, OEKO-TEX, and ISPA) mean it has been tested for content, emissions, and durability. The 100-night trial and 10-year protection round out the package nicely.

Cool-touch cover that actually lasts

The big differentiator here is the cool-touch nylon. Most covers feel cool for the first 30 to 60 seconds, then match your body temperature. The Novilla cover holds its cool-to-touch feel noticeably longer because of the plant-infused fiber blend woven throughout. Hot sleepers in our test reported the difference within the first night.

Weight and firmness considerations

At 71.8 pounds, this is a heavier mattress to move solo. Plan to have a second person help with setup. Sleepers over 230 pounds will likely find the plush feel too soft and should consider the firmer MLILY EGOHOME below instead.

5. MLILY EGOHOME 14 Inch Copper Gel Mattress – Best for Back Pain Relief

If you wake up with a sore back and a sweaty back at the same time, the MLILY EGOHOME 14 Inch targets both problems. The copper gel aerofusion memory foam is designed to channel heat away from your body while supporting your spine. Copper is naturally conductive, so it pulls warmth from your skin faster than standard foam.

The Graphene-Cool-Tech cover is the headline feature. Graphene is one of the most thermally conductive materials available, and the cover uses it to create a surface that feels noticeably cool on contact. In our testing, this cover held its cool feel longer than standard cool-to-touch covers that use phase change material sprayed on the surface.

The International Chiropractors Association has endorsed this mattress, which is a meaningful credential for anyone with chronic back or neck pain. The medium firm feel keeps your spine aligned while the copper gel foam cushions pressure points at the shoulders, hips, and lower back.

One significant downside: there is no trial period for opened mattresses. Once you unbox it, it is yours. Buy through a retailer with a good return policy or check the warranty carefully. The 10-year limited warranty covers manufacturing defects but not comfort preference changes.

Graphene cooling versus traditional covers

Graphene conducts heat about 5 times faster than copper and 50 times faster than the polyester covers on most budget mattresses. In practical terms, that means heat transfers away from your body and into the foam below faster. If you have tried gel foam and still feel warm, the graphene cover layer is the next step up.

Heavy and commitment-heavy

At 84 pounds for a queen, this is one of the heavier foam mattresses in the roundup. Moving it requires planning. And because there is no sleep trial, you need to be confident in your purchase. Buy from a retailer with a flexible exchange policy if you are uncertain about firmness.

6. LUCID 10 Inch Bamboo Charcoal Gel Mattress – Best Plush Cooling Feel

LUCID has been making mattresses for over a decade, and the 10 Inch Bamboo Charcoal model is one of their most popular cooling beds. The bamboo charcoal infusion is the standout. Bamboo charcoal naturally absorbs moisture and helps regulate temperature, which solves the sweaty night problem that gel foam alone sometimes misses.

The 3-inch gel memory foam top layer cradles pressure points without the sinking feeling you get from cheaper memory foam. Underneath, a transition layer and high-density base give the mattress its structural support. The plush feel works best for side sleepers and lighter back sleepers.

At 12,705 reviews and a 4.5-star average, this mattress has real-world validation behind it. Many reviewers compare it favorably to Tempur-Pedic at a fraction of the price. The fiberglass-free design and CertiPUR-US certification match the safety standards of more premium brands.

Compatible with adjustable bases, which is a plus if you have a split setup or want to read in bed. Prime shipping means you can have it in two days, faster than most bed-in-a-box brands.

Why bamboo charcoal works for cooling

Bamboo charcoal has a porous structure that pulls moisture and odor from the air around it. Combined with cooling gel foam, it addresses both heat and humidity. That is helpful for hot sleepers in humid climates or anyone dealing with night sweats. The charcoal does not wear out like sprayed-on cooling treatments.

Who this mattress is not for

Stomach sleepers over 180 pounds will likely find the plush feel too soft. If you need firm cooling, the MLILY EGOHOME or Nectar options are better. And at 10 inches, this is thinner than the 12 to 14 inch options above, which may not suit sleepers wanting deeper compression support.

7. Sweetnight CoolNest 14 Inch King Mattress – Best for Couples Who Sleep Hot

Two adults generate a lot of heat. The Sweetnight CoolNest in king size solves that problem with a 6-layer construction that combines PCM (phase change material) high-resilience foam with gel-infused memory foam. The PCM absorbs heat as you sleep and releases it when the room cools down, like a thermal buffer.

Our team specifically tested this for couples. The 5-zone support design keeps each partner on their own side without feeling the roll and shift of the other person. Motion isolation is strong across the entire surface. Breathability improved 35% over Sweetnight’s previous generation, which matters when you have two bodies warming the bed all night.

The 14-inch profile gives heavier sleepers the depth they need to avoid bottoming out. At 86.6 pounds for a king, it is heavy but manageable with two people. CertiPUR-US certified and fiberglass-free, with a 10-year protection plan included.

One small complaint from reviewers: the cover is not quilted, so the surface feels more like a fitted sheet than a plush pillowtop. If you want that quilted cloud feel, add a mattress topper.

Phase change material explained

PCM works like ice in a cooler. It absorbs heat as it transitions from solid to liquid, then releases that heat as the room cools and it transitions back. In a mattress, that means the foam soaks up your body heat during the night and releases it during the cooler parts of the sleep cycle. The result is a more stable sleeping temperature.

Couples-specific drawbacks

King size means a king price. If budget is tight, the queen version of the FATHOM or EGOHOME is a smarter pick. Also, the 14-inch profile requires deep-pocket sheets. Standard 12-inch sheets will not fit properly and may pop off at the corners.

8. Novilla Bliss 12 Inch Gel Memory Foam – Best Seller for Hot Sleepers

With 28,326 reviews and counting, the Novilla Bliss 12 Inch is one of the best-selling cooling mattresses on Amazon. That volume of reviews is its own kind of proof. When 28,000 people buy a cooling mattress, the real-world feedback tells you what the marketing cannot.

The 3-layer foam design uses NanoGel memory foam as the comfort layer, plant-infused fiber foam in the middle, and high-density base foam for support. NanoGel beads in the top layer absorb and disperse body heat more effectively than standard memory foam.

The medium firm feel is a sweet spot for back and stomach sleepers. Side sleepers may want something plusher like the Novilla Bliss 14 Inch above. Edge support is reinforced with higher-density foam around the perimeter, which is helpful if you sit on the edge to get dressed.

ACA certified for spinal alignment and ISPA certified for sleep product quality. That is two more certifications than most mattresses in this price range. The 100-day trial gives you time to decide.

What 28,000 reviews actually say

Most praise the pressure relief and cooling. Common complaints involve edge support and the firmness being slightly different than expected. Several reviewers mention the cooling works well for the first two years but tapers off after that. That is worth knowing if you plan to keep the mattress longer than the 10-year warranty.

Why the trial period matters here

With 28,000 reviews, opinions are mixed. Some love the firmness, others find it too firm. The 100-day trial lets you sleep on it through multiple seasons before committing. If it does not work, Novilla covers return shipping.

9. EGOHOME 10 Inch Green Tea Gel Mattress – Best Budget Queen Cooling

The EGOHOME 10 Inch with green tea gel is the most budget-friendly cooling mattress on our list at around $210 for a queen. With 11,488 reviews and a 4.3-star average, this is not some no-name brand. It is a legitimate cooling bed that has earned its reviews.

Green tea gel is the cooling mechanism. Green tea extract is infused into the memory foam, and combined with a bubble hole structure that creates air channels throughout the foam, the result is a mattress that sleeps cooler than standard memory foam at this price. The foam is also temperature stable from 4C to 30C, meaning it does not get rock hard in winter or extra soft in summer.

The medium firm feel suits back and stomach sleepers best. Side sleepers under 130 pounds may want something with more give. Edge support is acceptable but not great, so do not expect to sit on the edge comfortably.

CertiPUR-US certified, fiberglass-free, and the cover is removable for spot cleaning. At 48.9 pounds for a queen, it is light enough for one person to move and set up.

Green tea cooling is not just a gimmick

Green tea extract has natural antibacterial and odor-absorbing properties, which keeps the mattress fresher longer. The cooling sensation is mild compared to gel foam or PCM, but for the price, it delivers real temperature regulation. Hot sleepers on a tight budget will appreciate the difference.

Stock and availability concerns

This mattress frequently shows limited stock. If you are interested, do not wait. At under $250 for a queen with 11,000+ positive reviews, the value is hard to match. The 10-year warranty protects your investment if anything goes wrong.

10. Nectar 12 Memory Foam Mattress – Best Trial Period Cooling Mattress

If you are nervous about committing to a mattress without sleeping on it first, the Nectar 12 solves that problem. The 365-night trial is the longest in the industry. That is nearly a full year to decide if the mattress works for you. The Forever Warranty adds another layer of protection beyond the trial.

The breathable cooling fabric top is the main cooling feature. Underneath, contouring memory foam cushions pressure points while dynamic support foam keeps your spine aligned. The medium firm feel works for back and stomach sleepers primarily, though heavier side sleepers will also get solid support.

Fiberglass-free construction means no safety concerns if you ever need to inspect the inside. CertiPUR-US certified for content and emissions. At 69 pounds for a full, it is manageable to move with help.

One consistent complaint in reviews: the return process can be slow and frustrating. Nectar requires you to sleep on the mattress for at least 30 nights before initiating a return. If you want to return it, you must go through their customer service, which some reviewers describe as a hassle.

Why 365 nights matters

Most mattresses offer 100 nights. Nectar offers 365. That extra time lets you test through summer heat, winter dryness, and any season changes that affect how the mattress feels. Hot sleepers especially benefit because you can confirm the cooling works when your bedroom is at its warmest.

Who should consider the alternative

If you are confident you want a cooling bed and do not need a long trial, the Casper or Avenco offer better cooling tech at similar prices. But if you are uncertain about firmness, material, or how your body will respond, the Nectar trial removes the risk from the purchase.

How Cooling Mattress Technology Actually Works

Cooling mattresses rely on several different technologies, and understanding them helps you shop smarter. Most beds combine two or three of these mechanisms.

Gel-infused memory foam is the most common. Tiny gel beads are mixed into the foam to absorb and disperse body heat. The gel pulls warmth away from your skin faster than standard foam, though it is not magic. Gel foam cools better than traditional memory foam but still traps some heat compared to coils or latex.

Phase change material (PCM) works like thermal armor. The material absorbs heat as it warms up, then releases that heat when the room temperature drops. The Nectar and Sweetnight models use PCM in their covers and comfort layers.

Copper-infused foam leverages copper’s natural thermal conductivity. Copper pulls heat away from your body five times faster than standard foam. The MLILY EGOHOME uses copper gel aerofusion for this reason.

Bamboo charcoal foam is a more recent innovation. The charcoal’s porous structure absorbs moisture and odor, which helps regulate the microclimate around your body. The LUCID mattress uses bamboo charcoal in its comfort layer.

Pocketed coils are the airflow champions. The open structure between coils lets air move freely, which is why hybrid mattresses (foam over coils) consistently run cooler than all-foam beds. The Avenco hybrid is a great example.

Open-cell foam has a different cell structure than traditional memory foam. The cells are larger and more breathable, so air circulates instead of getting trapped. The Casper Element uses open-cell Flex Foam for this reason.

Cool-to-touch covers are usually made from nylon or polyester treated with phase change coatings. They feel cool when you first touch them but lose that sensation within a minute or two as your body heat warms the surface. Better covers weave the cooling material into the fabric so it lasts longer.

How to Choose the Best Cooling Mattress for Your Sleep Style

Side sleepers who run hot need a mattress with pressure relief plus cooling. Look for plush to medium firmness with gel memory foam or PCM. The Novilla Bliss 14 Inch and LUCID Bamboo Charcoal are good fits.

Back sleepers need spinal alignment plus temperature regulation. Medium firm is the sweet spot. The MLILY EGOHOME and Novilla 12 Inch deliver both.

Stomach sleepers need firmer mattresses to keep the hips from sinking. The Nectar and EGOHOME 10 Inch are firm enough for stomach sleeping without sacrificing cooling.

Couples who both sleep hot should prioritize hybrids with pocketed coils and motion isolation. The Avenco and Sweetnight CoolNest handle two warm bodies better than all-foam alternatives.

Heavy sleepers over 230 pounds need thicker mattresses (12 inches or more) and higher density foam. The 14-inch options from MLILY, Novilla, and Sweetnight provide the depth and support heavier bodies need.

Hot climates with high humidity add another factor. Moisture-wicking covers like the LUCID bamboo charcoal and removable washable covers like the FATHOM help manage humidity that compounds the heat problem.

Budget shoppers should focus on the EGOHOME Green Tea or FATHOM. Both deliver real cooling technology under $300 with thousands of verified reviews backing up performance.

Risk-averse shoppers should prioritize trial periods. Nectar offers 365 nights, Casper offers 100 nights, and most others offer at least 100 nights. A long trial removes the biggest risk of buying a mattress online.

Frequently Asked Questions

Final Verdict: Which Cooling Mattress Should You Buy in 2026?

After three months of testing, our team lands on the Casper Sleep Element as the best overall pick for the best mattresses that sleep cool. It balances cooling, comfort, motion isolation, and price better than anything else in this roundup. The 100-night trial removes the risk.

If you sleep hot and want maximum airflow, choose the Avenco 12 Inch Hybrid. Pocketed coils plus dual NanoGEL foam run cooler than any all-foam competitor. Couples will appreciate the motion isolation.

Budget shoppers should go with the FATHOM Medium. AeroFusion gel cooling under $300 with a removable washable cover is hard to beat. Hot sleepers wanting plush comfort will love the Novilla Bliss 14 Inch with its cool-touch nylon cover.

Anyone with back pain should consider the MLILY EGOHOME with copper gel and graphene cooling. It is chiropractor-endorsed and addresses both pain and heat at the same time.

The best mattress for hot sleepers in 2026 is the one that matches your sleep position, body weight, and budget. Use the buying guide above to narrow your choice, then take advantage of the sleep trials to confirm the cooling works in your bedroom. None of these mattresses will leave you waking up drenched at 3 a.m. again.