9 Best Cooling King Size Mattresses (November 2026)
The best cooling king mattresses include the COOL GEL 12 Inch King Mattress for open-cell airflow, the ZINUS 12 Inch Green Tea Cooling Gel for gel and green tea foam, and the Tempur-Pedic TEMPUR-Adapt + Cooling 3-Inch King Mattress for adding a cooling layer.
On this page (6 sections)
The best king mattress for cooling is the COOL GEL 12 Inch King Mattress, with ventilated open-cell foam and medium-firm support. For a spring-supported feel, compare the Sleepmax or Sweetnight CoolNest hybrid picks.
A king bed gives two people room to spread out, but more surface area does not automatically mean a cooler night. Look at the actual cover and foam design, then consider motion transfer and how each person sleeps.
If you’re still deciding which mattress to buy, start with feel and construction. Our guide to the best cooling mattress for hot sleepers covers broader options, while this roundup focuses on king beds.
Our picks at a glance
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1
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2
Best for gel and green tea foamZINUS 12 Inch Green Tea Cooling Gel
9.6/10 our score
See it on Amazon -
3
Best for adding a cooling layerTempur-Pedic TEMPUR-Adapt + Cooling 3-Inch King Mattress
9.5/10 our score
See it on Amazon
- 4
Check itZinus 12 Inch King Cooling Essential Memory
Best for a medium feel and motion control - 5
Check itNovilla Bliss Cooling King Size Mattress
Best for a cool-touch cover - 6
Check itSleepmax King Size Mattress 14 Inch
Best for foam and pocketed coils - 7
Check itNovilla AiryFlow Graphene 14 Inch King Size
Best for zoned foam support - 8
Check itSweetnight CoolNest 14 Inch King Size Mattress
Best for zoned pressure cushioning - 9
Check itSweetnight CoolNest Hybrid King Size Mattress
Best for a cooling hybrid feel
How we chose cooling king mattresses
We compared the stated materials, construction, firmness and cooling features for each king mattress. Our score weighs specs, features and buyer feedback against what you’re shopping for.
Cooling terms can describe different things: a cool-touch cover, gel foam, airflow channels or a combination. They do not guarantee a particular sleep temperature, so match the feature to what you notice most at night.
For memory foam options, our guide to the best cooling gel memory foam mattress explains how gel and foam design differ. If a queen is the better fit for your room, see our best cooling mattress queen picks.
| Product | Best for | Height | Feel | Construction | Our score |
|---|---|---|---|---|---|
| COOL GEL 12 Inch King Mattress | open-cell airflow | 12 in | Medium firm | Gel memory foam | 9.7 |
| ZINUS 12 Inch Green Tea Cooling Gel | gel and green tea foam | 12 in | Medium | Gel memory foam | 9.6 |
| Tempur-Pedic TEMPUR-Adapt + Cooling 3-Inch King Mattress | adding a cooling layer | Medium firm | 9.5 | ||
| Zinus 12 Inch King Cooling Essential Memory | a medium feel and motion control | 12 in | Medium | Memory foam | 9.3 |
| Novilla Bliss Cooling King Size Mattress | a cool-touch cover | 14 in | Medium | Memory foam | 8.8 |
| Sleepmax King Size Mattress 14 Inch | foam and pocketed coils | 14 in | Just-right firmness | Hybrid with pocketed coils | 8.7 |
| Novilla AiryFlow Graphene 14 Inch King Size | zoned foam support | 14 in | Medium firm | Gel memory foam | 8.6 |
| Sweetnight CoolNest 14 Inch King Size Mattress | zoned pressure cushioning | 14 in | Medium | Memory foam | 8.5 |
| Sweetnight CoolNest Hybrid King Size Mattress | a cooling hybrid feel | 14 in | Medium firm | Hybrid with pocketed coils | 8.1 |
The best king cooling mattresses for different needs
The COOL GEL and Zinus models lead this group on the assigned scores, while the Tempur-Pedic pick is a topper rather than a complete mattress. Choose by construction and cover first, especially if you and your partner prefer different sleep feels.
COOL GEL 12 Inch King Mattress: Best for open-cell airflow
- 12 in gel memory foam
- Ventilated open-cell design
- Medium-firm support
- Fiberglass-free
Ventilated open-cell foam is the standout cooling feature in this 12-inch king mattress. Its medium-firm feel and pressure-relieving foam layers suit shoppers who want an all-foam bed.
Pros
- Ventilated open-cell foam
- Medium-firm support
- CertiPUR-US certified and fiberglass-free
Cons
- Foam construction may not suit shoppers who prefer coils
- Cooling results vary by sleeper and room
The COOL GEL mattress stands out for its ventilated open-cell foam. Its 12-inch construction pairs breathable comfort foam with a high-density foam base, and the brand describes its feel as medium firm.
For a shared bed, the low-motion-transfer feature may help limit how much movement travels across the surface. It is still an all-foam design, so it will feel different from a mattress with pocketed coils.
The mattress is also described as fiberglass-free and CertiPUR-US certified. COOL GEL lists king dimensions of 80 x 76 x 12 inches, useful when checking your frame and fitted sheet depth.
Choose this one if you want a king foam mattress with a stated airflow feature and medium-firm support. If you want a more contouring gel-and-green-tea foam stack, compare the Zinus below.
ZINUS 12 Inch Green Tea Cooling Gel: Best for gel and green tea foam
- 12 in memory foam
- Gel and green tea infused foam
- Medium feel
- CertiPUR-US certified
This 12-inch Zinus combines cooling gel and green tea infused memory foam with softer comfort foam and a high-density base. Its medium feel offers a balanced option for a shared king bed.
Pros
- Gel and green tea infused memory foam
- Medium feel
- Available in king size
Cons
- Foam may feel warmer than a coil-forward design for some sleepers
- Allow time for expansion after unboxing
Zinus layers 2 inches of gel and green tea infused memory foam over 3 inches of comfort foam and a 7-inch high-density base. To understand how those materials differ, read gel foam vs memory foam.
The 12-inch build has a medium feel, placing it in the middle of this roundup's firmness range.
Green tea extract and purified charcoal are part of the foam design. Zinus also describes the mattress as cooling and pressure relieving, while the CertiPUR-US certification applies to the foam.
A king can make it easier for partners to choose separate positions, but both sleepers still share the same feel and temperature conditions. The foam layers are worth considering if you want cushioning and motion absorption more than a coil-forward surface.
Allow up to 72 hours for the mattress to regain its full shape after unboxing. If side sleeping is your main concern, see our best cooling mattress for side sleepers guide.
Tempur-Pedic TEMPUR-Adapt + Cooling 3-Inch King Mattress: Best for adding a cooling layer
- 3 in memory foam topper
- King size
- Washable cover
- Staytight corner straps
This is a king-size cooling topper, not a mattress. Its 3-inch TEMPUR material and removable washable cover can change the feel of an existing bed.
Pros
- Adds a 3-inch comfort layer
- Removable, machine-washable cover
- Corner straps help hold it in place
Cons
- A topper does not replace a mattress
- Its stated dimensions are slightly smaller than some king mattresses
This Tempur-Pedic pick is a 3-inch king topper, not a mattress. It adds TEMPUR memory foam to an existing bed and comes with a removable, machine-washable cover and corner straps.
The stated size is 79 x 75 inches, slightly smaller than the 80 x 76-inch dimensions listed for several king mattresses here. Measure your mattress surface if a close edge-to-edge fit matters.
A topper can change the feel of a bed, but it won't change the underlying mattress support or construction. The medium-firm topper may make sense if your mattress is still supportive and you want an added foam layer.
Choose it to refresh a king bed rather than furnish one from scratch. Check the fit and care instructions before pairing it with your current mattress.
Zinus 12 Inch King Cooling Essential Memory: Best for a medium feel and motion control
- 12 in memory foam
- Cooling gel foam
- Medium feel
- Fiberglass-free
Cooling gel foam and a breathable cover are paired with motion-absorbing memory foam. The medium feel is aimed at a range of sleep positions, and the king size supports up to 500 lb.
Pros
- Cooling gel memory foam
- Breathable cover
- Compatible with adjustable bases
Cons
- All-foam feel may not suit coil fans
- Requires 24–72 hours to fully expand
The Zinus Cooling Essential combines cooling gel memory foam with a breathable cover and a medium feel. It also absorbs motion, which may help when one partner shifts during the night.
Its foam is CertiPUR-US certified, and the cover is OEKO-TEX Standard 100 certified. Zinus says the mattress uses a carbon-rayon flame barrier instead of fiberglass.
This mattress is listed as compatible with platform beds, box springs, slatted frames and adjustable bases. For adjustable-bed shoppers, also read whether hybrid mattresses work on adjustable bases before choosing a coil model.
The mattress comes compressed and needs 24–72 hours to expand. It suits shoppers who want a medium all-foam bed with cooling gel and a stated compatibility range for common frames.
Novilla Bliss Cooling King Size Mattress: Best for a cool-touch cover
- 14 in gel memory foam
- Cool-touch nylon cover
- Medium feel
- Three foam layers
A cool-touch nylon cover and NanoGEL memory foam distinguish this 14-inch king bed. The three-layer foam build also targets pressure relief and motion isolation for couples.
Pros
- Cool-touch nylon cover
- Three-layer foam construction
- Novilla states a 100-night trial
Cons
- A 14-inch mattress may need deep-pocket sheets
- Foam feel may not suit shoppers who prefer springs
Novilla's Bliss has a 14-inch profile and a cool-touch nylon cover blended with plant-infused fiber. NanoGEL memory foam sits in a three-layer foam system with cushioning and high-density support foam.
The medium feel may suit couples looking for a balance between cushioning and support. Novilla also describes reinforced edges and motion isolation, two details that can matter when sharing a wide mattress.
The 14-inch height can affect fitted-sheet fit and the final bed height, so check your bedding depth and frame clearance. The mattress ships compressed in a box and is described as compatible with standard bed frames.
Pick the Bliss if a cool-touch cover is a priority and you prefer a thicker all-foam mattress. If you favor coils and a firmer hybrid feel, compare the Sleepmax or Sweetnight hybrid options.
Sleepmax King Size Mattress 14 Inch: Best for foam and pocketed coils
- 14 in hybrid
- Pocketed coils
- Gel memory foam
- CertiPUR-US and OEKO-TEX materials
Sleepmax pairs pocketed coils with foam layers, including gel memory foam, in a 14-inch hybrid. Its mix of cushioning and spring support may suit couples who want an alternative to an all-foam bed.
Pros
- Pocketed coils and foam layers
- Motion isolation is a stated feature
- CertiPUR-US and OEKO-TEX materials
Cons
- No specific cooling cover material is described
- Hybrid feel may differ from an all-foam bed
Sleepmax is a 14-inch hybrid with pocketed coils, gel memory foam and a Euro top. The individually wrapped springs are designed to isolate motion, while the foam layers add cushioning.
Its “just right” firmness description does not give a precise firmness scale, so treat it as a general feel label. The cotton cover and CertiPUR-US and OEKO-TEX certified materials are other details to weigh.
The product is a candidate for couples who want some coil response without giving up foam comfort layers. Check the bed frame and room access before delivery, since the mattress weighs 104 lb.
Choose Sleepmax if you prefer hybrid construction and want pocketed coils under foam. For a more specific firmness comparison, see our best hybrid mattress king firm guide.
Novilla AiryFlow Graphene 14 Inch King Size: Best for zoned foam support
- 14 in memory foam
- Graphene fabric cover
- Three-zone foam
- Medium-firm feel
This 14-inch foam mattress combines a graphene fabric cover, NanoGEL memory foam and three support zones. Its breathable mesh sides and motion-isolating layers are features to consider for a shared king.
Pros
- Three-zone foam design
- Breathable mesh around the sides
- CertiPUR-US foams and OEKO-TEX fabric
Cons
- Foam construction may not suit coil fans
- Medium-firm feel is not universally comfortable
Novilla AiryFlow uses a graphene fabric cover, NanoGEL memory foam and three support zones in a 14-inch all-foam design. The brand describes the cover as helping disperse heat, while breathable mesh around the sides is intended to release heat and moisture.
Its medium-firm feel and motion-isolating layers may interest couples who want a steadier surface. The three zones are designed to give different support across the shoulders, lumbar area and hips.
The mattress uses CertiPUR-US certified foam and OEKO-TEX certified fabric, and it is described as fiberglass-free. As with other foam beds, the cover and construction details can guide comparison, but they can't promise that every sleeper will feel cool.
Choose AiryFlow if zone support and a breathable side mesh are priorities. Its medium-firm feel may be firmer than the medium options above.
Sweetnight CoolNest 14 Inch King Size Mattress: Best for zoned pressure cushioning
- 14 in memory foam
- PCM and gel infused foam
- Five-zone design
- 3D-woven cover
Sweetnight layers PCM high-resilience foam and gel memory foam in a 14-inch king mattress. Its five-zone design and 3D-woven cover make it a feature-rich option for shoppers comparing foam beds.
Pros
- PCM and gel foam layers
- Five-zone support design
- Motion-isolating foam layers
Cons
- Foam can limit airflow compared with coils
- Allow up to 72 hours for expansion
The CoolNest is a 14-inch memory foam mattress with PCM high-resilience foam, gel-infused memory foam and a five-zone design. Its 3D-woven cover is designed to improve breathability, while the foam layers are intended to reduce motion transfer.
A medium feel gives it a different position from the medium-firm AiryFlow and hybrid models. Sweetnight says the foam is CertiPUR-US certified and advises allowing up to 72 hours for full expansion.
For two people, the motion-isolating foam may be useful if movement wakes the other sleeper. The all-foam construction will feel more contouring than a pocketed-coil hybrid.
Choose this CoolNest if you want a zoned foam design with both PCM and gel layers. Check fitted-sheet depth for its 14-inch profile.
Sweetnight CoolNest Hybrid King Size Mattress: Best for a cooling hybrid feel
- 14 in hybrid
- Ice silk cover
- Pocketed coils
- Gel memory foam
This 14-inch hybrid combines an ice silk cover, PCM foam, gel memory foam and individually wrapped coils. It is a useful comparison for couples who want cooling features with a spring-supported feel.
Pros
- Ice silk cover and PCM foam
- Individually wrapped coils
- Reinforced foam edge support
Cons
- Heavier than the all-foam picks
- Cooling claims are brand descriptions, not a guarantee
This CoolNest is the second hybrid in the group, pairing an ice silk cover and PCM foam with gel memory foam and 600 individually wrapped coils. For more king beds with a cushioned top, compare king pillow-top mattresses.
The 14-inch mattress is described as medium firm.
Sweetnight also describes reinforced foam around the edges and a pillow top with two foam layers. Those features may appeal to couples who use more of the king surface or prefer a cushioned top over a coil base.
At 133.4 lb, it is the heaviest option here, so plan the route into the bedroom before delivery. Its coil and foam construction offers a different feel from the all-foam CoolNest above.
Pick this model if you want a hybrid with a cooling cover and pocketed coils. If edge support and firmness lead your search, compare it with our best firm king hybrid mattresses.
What should you compare in a cooling king mattress?
Compare the cover, comfort layers and support core, because each can affect how a bed feels to a hot sleeper. A cooling label alone doesn't tell you whether the surface will suit your room, bedding or sleep preferences.
A cool-touch fabric may feel different when you first lie down than a foam layer designed to move heat or a construction intended to encourage airflow. Check whether the feature is in the cover, the foam, the support core or several parts of the mattress.
For couples, consider motion absorption alongside cooling features. Foam often absorbs movement, while hybrids add coils that may feel more responsive; the specific layer design matters more than the category name alone.
Does a king mattress help couples sleep cooler?
A king mattress adds sleeping space, but it cannot control each partner's heat or bedding. Its wider surface may give you more room to move away from a warm spot, while motion isolation can matter if one person shifts often.
Compare the bed's full 80 x 76-inch footprint with your bedroom layout and frame. A larger surface also needs appropriately sized bedding, and a 14-inch profile may call for deeper fitted sheets.
If one partner sleeps on their side, pressure cushioning and firmness may matter as much as cooling. Check each person's comfort priorities before choosing one shared feel.
How do foam and hybrid cooling king beds differ?
All-foam mattresses use foam layers for both comfort and support, while hybrids pair foam with coils. Foam models in this roundup include gel, open-cell or PCM features; hybrids add pocketed coils under their comfort layers.
A foam bed may absorb movement and contour closely. A hybrid may feel more springy and responsive, although the cover, foam layers and coil layout still shape the feel.
Compare individual features rather than assuming every hybrid sleeps cooler or every foam bed sleeps warmer. If you are choosing for an adjustable base, review the mattress and base guidance together before buying.
Which cooling king mattress should you choose?
Choose the COOL GEL for ventilated open-cell foam, the Zinus Green Tea for gel and green tea infused layers, or the Tempur-Pedic topper if you want to add a layer to a bed you already own. For coils, compare Sleepmax with Sweetnight CoolNest Hybrid.
The best king mattress cooling choice depends on the feature you value most: open-cell foam, a cool-touch cover, zone support or pocketed coils. Confirm frame fit, mattress height and sheet depth before you order.
Our top 3 picks at a glance
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1
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2
Best for gel and green tea foam
ZINUS 12 Inch Green Tea Cooling Gel
9.6/10 our score
See it on Amazon -
3
Best for adding a cooling layer
Tempur-Pedic TEMPUR-Adapt + Cooling 3-Inch King Mattress
9.5/10 our score
See it on Amazon
Frequently asked questions
What makes a king mattress feel cooler?
A mattress may feel cooler with a breathable cover, open-cell foam, gel foam, or a coil layer that leaves more room for airflow. The room temperature, sheets, bed frame and each sleeper also affect heat buildup.
Compare the materials and construction, then pair the bed with breathable bedding.
Is a king mattress good for couples who sleep hot?
A king gives couples more room to choose their own sleep space, but size alone does not make a mattress cooler. For shared beds, compare motion isolation as well as cooling features so movement is less likely to disturb a partner.
A foam or hybrid design may suit different preferences.
Are cooling gel mattresses always cool?
No. Gel is one material feature, and it does not guarantee that every sleeper will stay cool all night.
Cover fabric, foam construction, room conditions and bedding all affect how warm a bed feels.
Look for specific design details, such as open-cell foam or a breathable cover, rather than relying on the word cooling alone.
Can I use a cooling mattress on an adjustable base?
Some foam and hybrid mattresses work with adjustable bases, but compatibility depends on the mattress design and the base maker's limits. Check the mattress and base guidance before pairing them.
Our guide to mattresses that work with adjustable bases explains the main fit questions.
Should hot sleepers choose foam or a hybrid king mattress?
A hybrid combines foam comfort layers with coils, while an all-foam mattress relies on foam throughout. Some shoppers prefer the spring-supported feel and airflow of a hybrid; others want the contouring and motion absorption of foam.
Compare firmness, cover material and return terms alongside cooling features.
