9 Best Cooling King Mattresses (November 2026)
The best cooling king mattresses include the MLILY EGOHOME King 14 inch Memory Foam for a cooling cover, the Zinus Memory Foam 12 Inch Green Tea for airflow foam layers, and the EGOHOME King Size Memory Foam Mattress for green tea gel foam.
On this page (5 sections)
The best cooling mattress king options pair a spacious 76 x 80 in sleep surface with features such as breathable covers, gel foam or airflow focused layers. We compared nine king mattresses by their cooling details, feel and construction, including foam and hybrid designs.
King size gives partners more room to move, but the larger surface doesn't automatically sleep cooler. If heat is your main concern, our guide to the best cooling mattress for hot sleepers covers cooling features across sizes.
Our picks at a glance
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Best for green tea gel foamEGOHOME King Size Memory Foam Mattress
9.6/10 our score
See it on Amazon
- 4
Check itNovilla Bliss King Size Mattress
Best for a breathable cover - 5
Check itCOOL GEL 12 Inch King Mattress
Best for open-cell airflow - 6
Check itSweetnight CoolNest 14 Inch King Size Mattress
Best for zoned cushioning - 7
Check itZinus 12 Inch King Cooling Essential Memory
Best for a medium feel - 8
Check itNovilla 12 Inch King Size Mattress
Best for a hybrid feel - 9Check it
COOL GEL Chill Memory Foam 14-Inch Mattress
Best for a taller plush profile
How we chose a cooling mattress king
The best cooling mattress king should pair a feature you can identify with the feel and construction you want. We compared the stated materials, profile, firmness and airflow details, then weighed those against the needs of couples and hot sleepers.
Our score weighs specs, features and buyer feedback against what you're shopping for. Cooling language describes the design intent, not a promise that every sleeper will feel cool.
A king mattress is commonly 76 x 80 in, so check that your frame supports that footprint. For a different size, see our guide to the best cooling mattress queen picks.
Comparing cooling features in king mattresses
The main difference among these king picks is how each approaches temperature management. Foam models use features such as gel, open cells or breathable covers, while the Novilla hybrid pairs AirBreeze fabric with coils.
| Product | Best for | Height | Feel | Cooling features | Our score |
|---|---|---|---|---|---|
| MLILY EGOHOME King 14 inch Memory Foam | a cooling cover | 14 in | Medium firm | Graphene cover, copper gel foam, breathable Adaptifoam | 9.7 |
| Zinus Memory Foam 12 Inch Green Tea | airflow foam layers | 12 in | Medium firm | Airflow enhancing comfort foam | 9.7 |
| EGOHOME King Size Memory Foam Mattress | green tea gel foam | 12 in | Medium firm | Green tea gel, breathable bubble hole structure | 9.6 |
| Novilla Bliss King Size Mattress | a breathable cover | 12 in | Medium plush | Breathable knit cover and gel memory foam | 9.5 |
| COOL GEL 12 Inch King Mattress | open-cell airflow | 12 in | Firm | Ventilated open-cell structure | 9.4 |
| Sweetnight CoolNest 14 Inch King Size Mattress | zoned cushioning | 14 in | Medium | PCM foam, gel foam, ventilated cover | 9.2 |
| Zinus 12 Inch King Cooling Essential Memory | a medium feel | 12 in | Medium | Cooling gel foam and breathable cover | 9.1 |
| Novilla 12 Inch King Size Mattress | a hybrid feel | 12 in | Medium plush | AirBreeze fabric for moisture wicking and airflow | 8.9 |
| COOL GEL Chill Memory Foam 14-Inch Mattress | a taller plush profile | 14 in | Firm | Gel foam layers and airflow focused design | 8.4 |
The best cooling king mattresses for different sleep needs
The highest scoring picks focus on multiple cooling details, while the remaining mattresses offer specific feel, profile or construction choices. Start with the feature that matters most to you, then check firmness and total bed height.
MLILY EGOHOME King 14 inch Memory Foam: Best for a cooling cover
- 14 in profile
- Graphene cooling cover
- Copper gel aerofuion memory foam
- Breathable Adaptifoam
The graphene cooling cover and layered foam give this king mattress several temperature focused features. Its medium firm feel and 14-inch profile may suit shoppers who want a taller all-foam bed.
Pros
- Graphene cooling cover
- Copper gel aerofuion foam
- Breathable Adaptifoam
Cons
- No trial period
- Requires 12 hours to expand
MLILY's 14-inch king mattress stands out for a graphene cooling cover combined with copper gel aerofuion foam. The brand says the cover is designed to regulate body temperature, while Adaptifoam is intended to support breathability and airflow.
Its medium firm feel may suit shoppers who want cushioning without choosing a plush profile. The high-density base foam is described as supporting the neck and shoulder area.
This is an all-foam mattress, so it won't have the springier feel of a hybrid. MLILY says to allow 12 hours for expansion, and it states there is no trial period and opened mattresses cannot be returned.
Choose it if cooling cover materials are high on your list and you want a 14-inch foam bed. If you prefer a different size, compare our best cooling mattresses for side sleepers for options selected around pressure relief and sleeping position.
Zinus Memory Foam 12 Inch Green Tea: Best for airflow foam layers
- 12 in profile
- 2 in airflow enhancing comfort foam
- Green tea and charcoal infused foam
- Medium firm feel
An airflow enhancing middle foam layer distinguishes this king mattress from simple memory foam designs. Green tea and charcoal infused foam is part of its freshness focused construction.
Pros
- Airflow enhancing comfort foam
- Three foam layers
- CertiPUR-US certified foam
Cons
- Allow 24–72 hours to regain full shape
- Spot clean only
The Zinus Green Tea mattress pairs a 2-inch airflow enhancing comfort foam layer with 3 inches of conforming memory foam and a 7-inch base. Green tea and ActivCharcoal are infused into the memory foam, with the charcoal described as moisture absorbing.
Its medium firm feel and layered construction offer a familiar all-foam option. Zinus describes the middle foam as encouraging airflow, which may appeal if dense foam beds tend to feel warm to you.
This model needs more time to regain its shape than some compressed mattresses. Zinus says to allow 24 to 72 hours, with a warmer room helping the foam expand faster.
Pick it if you want a 12-inch mattress with an airflow focused middle layer. Spot cleaning is the stated care method, so plan to use a washable protector if you want to guard the surface.
EGOHOME King Size Memory Foam Mattress: Best for green tea gel foam
- 12 in profile
- Green tea gel memory foam
- Bubble hole structure for airflow
- Medium firm feel
Green tea gel and a breathable bubble hole structure give this medium firm king foam mattress its cooling focus. It also uses memory foam intended to adapt as your sleep position changes.
Pros
- Green tea gel foam
- Airflow focused structure
- 10-year warranty
Cons
- Full expansion time isn't specified
- Foam mattress feel may not suit coil seekers
EGOHOME uses green tea gel memory foam and a bubble hole structure for this 12-inch king mattress. The brand says the structure supports breathable airflow and the gel helps regulate temperature.
The medium firm foam is described as adapting to body curves and sleep position changes. That can be useful if you share a bed and want a surface that conforms as each person shifts, though foam still feels different from coils.
This model's description includes CertiPUR-US and OEKO-TEX certification claims. Its stated warranty is 10 years.
Consider it if you want green tea gel in an all-foam king mattress with a medium firm feel. Compare the foam layers and cover features with our guide to How to Cool a Foam Mattress: 8 Ways to Sleep Cooler if your current bed also holds heat.
Novilla Bliss King Size Mattress: Best for a breathable cover
- 12 in profile
- Breathable knitted cover
- NanoGel memory foam
- Medium plush feel
The breathable knit cover and NanoGel memory foam make this a cooling oriented choice with a medium plush feel. Reinforced edges and motion absorbing foam add practical details for couples.
Pros
- Breathable knitted cover
- NanoGel memory foam
- Reinforced edge support
Cons
- Medium plush feel may be too soft for some
- Allow up to 72 hours to regain full shape
The Novilla Bliss combines a breathable knitted cover with NanoGel memory foam and a medium plush feel. The foam layers are described as absorbing motion, and reinforced edge support adds stability near the sides.
That mix may suit couples who want some surface cushioning and less movement transfer. The gel foam and breathable cover are the cooling details to compare, while the medium plush label helps set expectations for feel.
The mattress is 12 inches tall and typically regains its full shape within 72 hours. Novilla states that it comes with a 100-day trial and 10-year protection.
Choose it if a softer feel and edge stability matter alongside cooling features. If you're comparing foam against spring support, the simple guide to mattress types explains common constructions.
COOL GEL 12 Inch King Mattress: Best for open-cell airflow
- 12 in profile
- Ventilated open-cell design
- Medium firm support
- CertiPUR-US certified
A ventilated open-cell structure is the main cooling feature in this 12-inch king foam mattress. The medium firm design is described as suitable for back, side and stomach sleepers.
Pros
- Ventilated open-cell structure
- Fiberglass free
- CertiPUR-US certified
Cons
- Firmness field says firm
- Foam construction may feel different from a hybrid
The COOL GEL 12-inch mattress uses a ventilated open-cell design to enhance airflow and heat dissipation. Its medium firm support and high-density foam base are intended to distribute weight and cushion pressure points.
This is a straightforward option if you want cooling features built into the foam rather than a more elaborate cover system. The brand describes the mattress as suitable for back, side and stomach sleepers, but firmness preference remains personal.
The foam is CertiPUR-US certified, and the mattress is described as fiberglass free. The manufacturer states a 10-year warranty.
Choose this one if open-cell airflow and a medium firm style fit your priorities. Confirm your frame can support a 12-inch mattress and consider the height of your existing bedding.
Sweetnight CoolNest 14 Inch King Size Mattress: Best for zoned cushioning
- 14 in profile
- PCM and gel infused memory foam
- 5-zone support design
- 3D-woven ventilated cover
The CoolNest layers PCM high-resilience foam with gel infused memory foam, plus a ventilated cover. Its 5-zone design and medium feel may suit shoppers who want cushioning with distinct support zones.
Pros
- Layered PCM and gel foam
- 5-zone design
- Motion isolation
Cons
- Allow 72 hours to expand
- 14 in height needs a compatible setup
Sweetnight's 14-inch CoolNest stacks PCM high-resilience foam, gel memory foam and a ventilated cover. The brand says these features work together to dissipate heat and support a cooler, drier sleep surface.
Its 5-zone design is meant to cushion pressure areas while maintaining support, and the stated feel is medium. Multiple memory foam layers also aim to reduce motion transfer, a useful consideration if one partner moves often.
Sweetnight says to allow 72 hours for the mattress to expand. Its 14-inch height can also affect the height of the finished bed, so check the frame and fitted sheet depth.
Choose it if you want a thicker foam mattress with several cooling features and zoned support. Skip it if your bed frame already sits high or you prefer a thinner profile.
Zinus 12 Inch King Cooling Essential Memory: Best for a medium feel
- 12 in profile
- Cooling gel memory foam
- Breathable cover
- Medium feel
Cooling gel memory foam and a breathable cover give this Zinus king mattress a straightforward cooling setup. Its medium feel and motion absorbing foam may work for couples with different sleep positions.
Pros
- Cooling gel foam
- Medium feel
- Compatible with platform beds and adjustable bases
Cons
- Allow 24–72 hours to expand
- King supports up to 500 lb
Zinus Cooling Essential keeps its approach simple: cooling gel memory foam and a breathable cover on a 12-inch mattress with a medium feel. The foam contours around shoulders, hips and joints, while the brand says it absorbs motion across the surface.
The medium feel may be a practical middle ground for partners with different positions. This mattress is also compatible with platform beds, box springs, slatted frames and adjustable bases.
Zinus says the foam is CertiPUR-US certified and the cover is OEKO-TEX Standard 100 certified. It uses a carbon-rayon flame barrier instead of fiberglass, according to the brand.
Consider it if you want a 12-inch king with cooling gel and a medium feel. The brand recommends allowing 24 to 72 hours for full expansion.
Novilla 12 Inch King Size Mattress: Best for a hybrid feel
- 12 in profile
- SmartS coils and foam
- AirBreeze fabric
- Medium plush feel
This hybrid combines SmartS coils with contouring foam and AirBreeze fabric. Choose it if you'd like a coil based king bed and a breathable, moisture wicking cover.
Pros
- Hybrid construction
- AirBreeze fabric
- Reinforced perimeter support
Cons
- Full expansion time isn't specified
- Medium plush feel may not suit firm bed shoppers
The Novilla hybrid combines SmartS coils, contouring foam and AirBreeze fabric in a 12-inch king mattress. The breathable cover is described as wicking moisture and enhancing airflow, while the coil layer gives it a different feel from all-foam options.
Its medium plush feel may appeal to shoppers who want cushioning with a coil base. Reinforced perimeter support is another practical detail if you sit or sleep near the edge.
The construction is described as fiberglass free, with CertiPUR-US foam and an OEKO-TEX cover. This product is a strong fit if you want a hybrid design and cooling fabric rather than gel as the main selling point.
Choose it if you prefer coils under foam and want edge support. If you want more details on side sleeping and pressure points, see our best cooling mattress for side sleepers.
COOL GEL Chill Memory Foam 14-Inch Mattress: Best for a taller plush profile
- 14 in profile
- Cooling gel memory foam layers
- CertiPUR-US certified
- Includes 2 pillows
Multiple layers of cooling gel memory foam and a 14-inch profile suit shoppers looking for a substantial foam bed. It includes 2 pillows and has a firm feel.
Pros
- 14 in profile
- Includes 2 pillows
- CertiPUR-US certified
Cons
- Allow up to 72 hours to expand
- A taller mattress changes total bed height
The COOL GEL Chill offers a 14-inch profile with multiple layers of cooling gel memory foam. Its firm feel, substantial height and included 2 pillows make it different from the other foam picks here.
The layered foam is described as helping dissipate heat while maximizing airflow. A thicker mattress can raise the overall bed height, so measure your frame and account for how high you want the finished bed to sit.
This mattress is a fit for buyers who prefer a more substantial surface and a firm feel. It is compressed for delivery, and the brand says to allow up to 72 hours for full expansion.
Choose it if you want a taller king foam mattress and the included pillows are useful to you. Consider a 12-inch model if you have a low bed frame or want easier sheet fit.
How to choose a cooling king mattress
A cooling king mattress is easier to compare when you separate surface size, cooling features and feel. Match each to your room, sleeping habits and bed setup before deciding.
Which cooling features matter most in a king mattress?
A breathable cover can help with surface airflow, while open-cell foam, gel infusions and PCM layers are design features intended to manage heat. Hybrid coils provide another construction choice, but the cover and comfort layers still affect how the bed feels.
If heat is your main concern, compare features across models rather than relying on a cooling label alone. A bamboo mattress topper is another bedding option some shoppers consider for changing the surface feel.
How should firmness and sleep position affect your choice?
Firmness is a personal preference, and a cooling feature doesn't determine whether a mattress will feel right for your body. Side sleepers often look for cushioning at the shoulder and hip, while back and stomach sleepers may prefer a more supportive feel.
The list includes medium, medium firm, medium plush and firm choices. If you have ongoing pain or sleep problems, ask a health professional for guidance.
What should you measure before buying a king mattress?
Measure the inside of your frame and check the mattress height, because these picks range from 12 to 14 inches. Include the foundation or adjustable base when estimating the finished bed height.
A standard king mattress is 76 x 80 in. Measure doorways and stairs too, especially if the mattress arrives compressed in a box.
Which cooling king mattress should you choose?
Choose the MLILY EGOHOME if a graphene cover and copper gel foam are your priorities, or the Zinus Green Tea if its airflow enhancing middle layer fits your needs. Pick Novilla's hybrid if you want coils with a breathable cover, and compare the medium plush Bliss if you prefer a softer feel.
A cooling mattress is only one part of the sleep setup. If you want to change the surface feel without replacing the bed, read what a cooling mattress pad is before choosing an accessory.
Our top 3 picks at a glance
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1
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2
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3
Best for green tea gel foam
EGOHOME King Size Memory Foam Mattress
9.6/10 our score
See it on Amazon
Frequently asked questions
Are king mattresses cooler than smaller mattresses?
A king size does not make a mattress cooler by itself. Cooling depends more on materials and construction, such as breathable covers, ventilated foam, gel infusions or coil layers.
A king offers more room to spread out, which may help partners avoid crowding, but it won't regulate temperature on its own.
What should I look for in a cooling king mattress?
Look for specific features such as a breathable cover, airflow channels, open-cell foam, gel infusions or a hybrid coil layer. Match those details to the feel you want, since cooling features don't tell you whether a bed will feel soft, medium or firm.
Check the full bed height against your frame and sheets, too.
Does gel memory foam sleep cool?
Gel memory foam is designed to help manage heat, but the feel can vary with the foam layers, cover and room conditions. A gel label alone doesn't guarantee that you'll stay cool all night.
Our guide to gel memory foam cooling claims explains what the material can and can't tell you.
Is a hybrid mattress a good choice for hot sleepers?
A hybrid may suit hot sleepers who want coils beneath foam, since the coil layer can leave more open space inside the mattress. Covers and comfort layers still matter, so compare the complete construction rather than relying on the hybrid label alone.
Can a cooling mattress pad help with heat?
A cooling pad can change the feel of the sleep surface and may be easier to replace than a mattress. It won't change the underlying mattress construction, so check the materials and care instructions before adding one.
See our guide to what a cooling mattress pad is.
