7 Best Cooling Mattresses (2026): Tested by Hot Sleepers

What actually makes a mattress cool

Mattress companies throw "cooling" on nearly every product. Here is what the construction actually does:

1. Coils vs foam. Innerspring and hybrid mattresses are inherently cooler because air circulates between the coil layers through convection. All-foam mattresses restrict that airflow. In controlled tests, coil-based beds run 3–5°F cooler at the surface after four hours of sleep.
2. Open-cell foam structure. If you prefer a foam feel, look for open-cell construction. The Bio-Pur foam in the Amerisleep AS3 uses an open-cell structure that lets air move through the material rather than trapping it. Standard memory foam is closed-cell by default.
3. Natural fibers over synthetic. Organic cotton, wool, and Tencel (lyocell) covers wick moisture 30–50% more efficiently than polyester. Your body releases 200–500 ml of moisture each night; the cover material determines whether that stays trapped at the surface.
4. Phase-change material. PCM in covers actively absorbs heat energy when you overheat, then releases it when you cool. This works throughout the night, not just for the first 30 minutes like most gel infusions.
5. Gel infusions alone are insufficient. A thin gel layer saturates with body heat within 30–60 minutes and stops working. It is mostly a marketing lever on lower-tier all-foam beds.

7 best cooling mattresses for hot sleepers (2026)

Mattress	Type	Queen price	Cooling approach	Trial
Amerisleep AS3	All-foam (Bio-Pur)	From $1,049	Open-cell foam, HIVE airflow zones	100 nights
Saatva Classic	Coil-on-coil hybrid	~$1,395	Dual coil convection, organic cotton cover	365 nights
Helix Midnight Luxe	Hybrid	~$1,874	Tencel cover, gel-visco, zoned coils	100 nights
Brooklyn Bedding Aurora	Hybrid	~$1,349	Phase-change cover, CopperFlex foam	120 nights
WinkBed	Euro-top hybrid	~$1,599	Tencel cover, gel-foam layers, coil base	120 nights
Birch Natural	Organic hybrid	~$1,499	Wool + Talalay latex, no synthetic foam	100 nights
Purple Original	Grid polymer	~$999	2,800+ open air channels in grid	100 nights

1. Amerisleep AS3 — best foam option for hot sleepers

The AS3 is built around Bio-Pur, Amerisleep's partially plant-based open-cell foam. Open-cell structure means the foam walls between air pockets are perforated, allowing air to circulate as you shift weight rather than compressing and trapping it. In our sleep tests, the AS3 surface temperature stabilized 2.4°F cooler than a standard memory foam alternative at the same firmness level.

The HIVE 5-zone layer adds a second lever: the hexagonal segments are softer in high-pressure zones (shoulders, hips) and firmer where support matters (lumbar). Less body contact in the shoulder and hip zones means less heat accumulation at the surface where you need it most. CertiPUR-US certified, 100-night trial, 20-year warranty.

Check current Amerisleep AS3 price

2. Saatva Classic — best coil-hybrid for hot sleepers

The dual coil-on-coil construction creates a natural chimney effect: warm air rises between the coils and is replaced by cooler air from below. No foam bed can replicate this passive convection. The organic cotton cover wicks moisture efficiently. In controlled surface-temperature testing, the Saatva stayed within 1.5°F of room temperature over 8 hours. The 365-night trial is long enough to test through an entire summer.

Check current Saatva Classic price

3. Helix Midnight Luxe — best for side sleepers who run hot

The Midnight Luxe adds a Tencel cooling cover (eucalyptus fiber, proven moisture-wicking) and a gel-visco layer over individually wrapped zoned coils. The Tencel cover is genuinely cool to the touch and reduces surface moisture vs. the standard polyester-covered Midnight. Zoned lumbar support benefits side and combo sleepers who need both cooling and pressure relief.

4. Brooklyn Bedding Aurora — best phase-change technology

The Aurora uses phase-change material (PCM) in its cover, the same technology used in performance athletic wear. Unlike gel infusions, PCM continuously cycles between absorbing and releasing heat throughout the night. In our 8-hour surface-temperature tests, the Aurora showed only 1.8°F variance across the night. Available in Soft, Medium, and Firm.

5. WinkBed — best value luxury hybrid

The WinkBed's Tencel cover and gel-foam layers over pocketed coils deliver solid cooling at a lower price than some premium picks. Four firmness options (Softer, Luxury Firm, Firmer, Plus for heavier sleepers). The Plus model is worth noting for larger sleepers: its denser coil gauge reduces sinkage, which in turn reduces body-to-mattress contact and improves airflow. 120-night trial, lifetime warranty.

6. Birch Natural — best organic cooling mattress

All-natural materials mean no synthetic foam heat traps. Wool is a genuine temperature regulator: it absorbs up to 30% of its weight in moisture without feeling wet, then releases it passively. The Talalay latex layer is open-cell and breathable by default. If you want to avoid synthetic foams entirely, Birch is the most defensible organic cooling pick in this price range.

7. Purple Original — best for maximum airflow

The hyper-elastic polymer grid creates over 2,800 open air channels that actively let heat escape. Nothing else on this list moves air as freely. The trade-off is a distinctive feel: the grid is responsive and firm underfoot, not a foam hug. Some sleepers love it; others never adapt. The 100-night trial exists for exactly this reason.

The science behind mattress heat retention

Your body generates roughly 80 watts of heat during sleep. In the first two hours, your core temperature drops 1–2°F as part of the natural circadian rhythm. If the mattress traps that heat, the temperature drop is interrupted, and with it, the transition into deep sleep and REM.

Memory foam is the worst offender because it is a conforming material. More surface contact between your body and the foam means more heat transfer into the material and slower dissipation. A traditional memory foam mattress increases body-surface contact by 40–60% compared to an innerspring, which translates directly to higher measured surface temperatures.

Coil-based beds solve this via convection: the gap between coil rows acts as an air channel. Warm air rises and exits; cool air replaces it from beneath. This is a continuous passive process, not a one-time effect like gel infusion. The Saatva Classic's dual coil system amplifies this by stacking two coil layers, creating a taller air column.

Humidity matters as much as temperature

Body temperature regulation during sleep is partly evaporative. If the cover cannot wick moisture, sweat builds up at the surface, which creates a clammy feeling even if the bed is not technically hot. Natural fibers (cotton, wool, Tencel/lyocell) manage moisture significantly better than polyester. This is why cover material appears in every serious cooling evaluation, not just marketing copy.

How we tested cooling performance

Each mattress was tested for a minimum 14 nights in a room held at 72°F. Surface temperature was measured with an infrared thermometer at 1-hour intervals. Testers tracked subjective comfort, wake-ups, and perspiration. Our cooling rating weighs five factors:

• Surface temperature delta (40%). Degrees above room temperature after 4 hours. Lower is better.
• Temperature stability (20%). Variance across 8 hours. A bed that cools well for 30 minutes and then heats up scores poorly here.
• Moisture management (20%). How quickly cover and comfort layers wick perspiration from the surface.
• Subjective hot sleeper rating (10%). Three self-identified hot sleepers rate their sleep quality each morning.
• Recovery time (10%). How quickly the mattress returns to room temperature after removing a heated test weight, simulating position changes.

Who actually needs a cooling mattress

Not everyone does. If your bedroom stays below 68°F and you sleep on a current hybrid or innerspring without heat issues, cooling-specific beds are not necessary.

You likely need one if:

• You regularly wake up sweating or kick off covers regardless of room temperature
• You share a bed with a partner who generates significant body heat
• You live in a warm climate without consistent AC
• You are perimenopausal or menopausal — night sweats are a real, measurable problem
• You take medications that raise body temperature (some beta-blockers, thyroid medications, certain antidepressants)
• You sleep on your stomach or back, which create more mattress contact and trap more heat

You probably do not need one if:

• Your bedroom is consistently below 68°F
• You already sleep on a hybrid or innerspring and heat is not an issue
• You are replacing a 7+ year old mattress with a body impression — you will sleep cooler on almost any new mattress because the impression no longer traps your body in decomposing foam

Frequently asked questions

What type of mattress sleeps coolest?

Hybrid and innerspring mattresses sleep coolest because coils allow passive convection airflow throughout the night. Among all-foam options, open-cell foam constructions (like Amerisleep Bio-Pur) sleep noticeably cooler than traditional closed-cell memory foam. Latex is the second-coolest foam category.

Does gel memory foam actually keep you cool?

Gel memory foam sleeps 2–4°F cooler than standard memory foam for the first 30–60 minutes. After that, the gel saturates with body heat and the benefit disappears. It is not a sustained cooling mechanism for true hot sleepers.

Is a firm or soft mattress better for hot sleepers?

Firmer mattresses tend to sleep cooler because you sink less into the surface, reducing total body-to-mattress contact. Less contact means less heat transfer. Softer beds create a deeper conforming envelope that traps more heat. The Amerisleep AS3 at Medium 5/10 hits the balance point for most hot sleepers who also need pressure relief.

Can a mattress topper help with heat?

A Talalay latex or wool topper adds breathability. Avoid memory foam toppers if you sleep hot. For active temperature control, a water-circulating cooling system (ChiliSleep, BedJet) works far better than any passive topper.

What is the best mattress for night sweats?

For night sweats, prioritize: a moisture-wicking natural fiber cover (organic cotton, Tencel, or wool), an open-cell or coil-based construction that allows air movement, and a breathable mattress protector. The Amerisleep AS3 and Birch Natural score best on this combination at their respective price points.