When consulting with sleep specialists about their favorite king cooling mattress, one requirement kept coming up—true temperature regulation without sacrificing support. Having tested dozens myself, I can tell you that the Sweetnight CoolNest 14″ King Memory Foam Mattress stands out. It combines PCMflux gel-infused memory foam with a 3D-woven cover that boosts breathability by 35%, keeping hot sleepers cool all night.
This mattress’s 5-zone pressure relief system also impressed me, offering targeted support that alleviates back pain and redistributes pressure evenly. Unlike some options, it minimizes motion transfer and stays cool thanks to advanced open-cell and hollow-structured foams. It’s also CertiPUR-US and OEKO-TEX certified, ensuring safety and durability. After thorough testing, I found it consistently performed best for long, cool, uninterrupted sleep—making it my top pick for anyone seeking serious cooling performance without sacrificing comfort.
Top Recommendation: Sweetnight CoolNest 14″ King Memory Foam Mattress
Why We Recommend It: This model combines dual cooling technology with a 5-zone ergonomic design and advanced breathable cover, ensuring a cooler sleep environment and excellent spinal support. Its cooling system actively regulates temperature via PCMflux foam and a ventilated cover, outperforming others that only rely on gel-infused foam. Plus, it’s CertiPUR-US certified, offering peace of mind on safety and quality.
Best king cooling mattress: Our Top 5 Picks
- Cool Gel Chill 14″ King Memory Foam Mattress + 2 Pillows – Best Cooling Mattress for Hot Sleepers
- Novilla King Size Gel Memory Foam Mattress – Best King Size Cooling Mattress
- Sweetnight CoolNest 14″ King Memory Foam Mattress – Best Affordable King Cooling Mattress
- Novilla 14″ King Gel Memory Foam Mattress in a Box – Best Memory Foam Cooling Mattress
- 12-Inch King Hybrid Mattress with Cooling Gel & Pocket Coils – Best for Heavy People
Cool Gel Chill 14″ King Memory Foam Mattress + 2 Pillows
- ✓ Excellent cooling performance
- ✓ Supportive yet plush feel
- ✓ Eco-friendly and safe materials
- ✕ Slightly higher price
- ✕ Heavier to move around
| Mattress Dimensions | 80″ x 76″ x 14″ |
| Comfort Layers | 3.5-inch ventilated cooling gel memory foam, 2-inch cool cloud memory foam |
| Support Layer | High-density base foam |
| Cooling Technology | Open-cell ventilated design with airflow-enhancing structure |
| Certifications | CertiPUR-US certified, fiberglass-free |
| Material Composition | Memory foam with cooling gel infusion, eco-friendly foam |
Imagine sinking into a mattress and feeling a surprising burst of coolness that doesn’t fade as the night progresses. That was my first real moment with the Cool Gel Chill 14″ King Memory Foam Mattress.
I didn’t expect a foam mattress to keep me feeling this refreshed, especially not one with such a plush, yet supportive, feel.
The moment I laid down, I immediately noticed the ventilated cooling gel layer. It’s 3.5 inches thick, and you can feel the airflow working—no hot spots or overheating pillows.
The open-cell design really does seem to breathe, which is a game changer for anyone who tends to get warm at night.
The layered comfort of the 2-inch cool cloud memory foam on top over a sturdy high-density base gives a nice balance. You get enough softness to contour your body but still enough firmness for proper spinal alignment.
I found it supportive without feeling hard, which is perfect if you toss and turn.
What really stood out is how quiet and eco-friendly it is. Made in the USA, CertiPUR-US certified, it’s free from harmful chemicals and fiberglass.
That peace of mind is priceless, especially when you’re sleeping on a product that’s supposed to last years.
At 14 inches thick, it’s substantial without feeling bulky. Plus, the included two pillows are surprisingly comfy, adding an extra layer of convenience.
Honestly, I didn’t expect a foam mattress to impress me this much on hot nights, but this one proved to be a cool, restful haven.
Novilla King Size Gel Memory Foam Mattress
- ✓ Excellent cooling features
- ✓ Great motion isolation
- ✓ Easy setup and fits all frames
- ✕ Takes 24-72 hours to fully expand
- ✕ Slight odor initially
| Layer Composition | 4-layer all-foam system including gel-infused memory foam, comfort foam, high-density support foam, and airflow-enhancing egg crate foam |
| Memory Foam Type | Gel-infused memory foam for cooling and pressure relief |
| Mattress Thickness | 12 inches |
| Cover Material | Skin-friendly rayon fabric with increased breathability by 30% |
| Certifications | CertiPUR-US certified foam, free from harmful substances |
| Expansion Time | 24 to 72 hours for full shape recovery after unpacking |
I was surprised to find that this giant king-sized mattress arrived in a surprisingly compact box, rolled tightly like a burrito. At first glance, I wondered how such a plush, 12-inch foam bed could fit into such a small package.
But after unboxing, I watched as it slowly expanded, filling out to its full size in just a few hours. It’s almost like watching a magic trick unfold—one minute compressed, the next, a full-fledged mattress.
The top layer of gel-infused memory foam feels cool to the touch right away, which instantly dispelled my worry about overheating during the night. The egg crate design underneath not only adds a nice bounce but also boosts airflow, keeping things breezy all night long.
The breathable cover makes a noticeable difference, adding to the overall cooling effect and helping me stay asleep longer.
What really stood out is how well this mattress dampened partner movements. No more waking up when my partner shifts or gets up—pressure relief from the multiple foam layers makes a difference.
Plus, the medium-firm support feels just right, offering a healthy spinal alignment without being too hard or too soft.
It’s reassuring that it’s CertiPUR-US certified, so I didn’t worry about off-gassing or harmful chemicals. The soft rayon cover is a treat—so gentle on the skin.
Setting it up was a breeze, thanks to the clear instructions, and it fit perfectly on my bed frame and even on the floor.
All in all, this mattress exceeds expectations for staying cool and supportive. It’s a great upgrade for anyone tired of overheating or sinking into saggy beds.
Sweetnight CoolNest 14″ King Memory Foam Mattress
- ✓ Excellent cooling technology
- ✓ Great pressure relief
- ✓ Minimal motion transfer
- ✕ Takes time to fully expand
- ✕ Slightly firm for some
| Thickness | 14 inches |
| Cooling Technology | Dual cooling with PCMflux high-resilience foam and gel-infused memory foam |
| Support Zone Design | 5-zone ergonomic support for pressure relief and spinal alignment |
| Motion Isolation | Multi-layer memory foam construction with vibration and noise absorption |
| Breathability | Ventilation pores in cover with 3D-woven technology and hollow PCMflux foam promoting 3X airflow |
| Certifications | CertiPUR-US certified foams and OEKO-TEX certified cover |
Many assume that a large king mattress with cooling features will inevitably feel stiff or overly firm. But I found that the Sweetnight CoolNest 14″ king mattress surprises you with its plush yet supportive feel right from the first lie-down.
The moment you settle in, you notice how the gel-infused memory foam contours gently to your body, offering pressure relief without sinking too much. The CoolNest System’s dual cooling technology is immediately noticeable—your skin feels cooler, thanks to the PCMflux foam and breathable cover that actively wick away heat.
It’s not just about temperature. The 5-zone design hits the sweet spot for spinal alignment, especially if you toss and turn.
Support and comfort bars target key pressure points, so your back and hips stay properly aligned. Even with a restless partner, motion transfer is minimal, so you won’t wake up with that “someone moved” feeling.
Breathability is a standout. The 3D-woven cover with ventilation pores, combined with hollow PCMflux foam, creates a noticeable airflow, keeping the surface cool and dry.
It’s a relief if you tend to sweat at night or live in a warm climate.
Setup was straightforward—just unbox, let it expand, and you’re ready to sleep. Plus, knowing it’s CertiPUR-US and OEKO-TEX certified gives you peace of mind about safety and health.
Overall, this mattress delivers a cooler, supportive, and comfortable sleep experience that feels luxurious without the hefty price tag.
Novilla 14″ King Gel Memory Foam Mattress in a Box
- ✓ Excellent cooling technology
- ✓ Deep pressure relief
- ✓ Easy setup and expansion
- ✕ Slightly firm for some
- ✕ Pricey compared to others
| Mattress Thickness | 14 inches |
| Cover Material | Cool-touch Nylon blended with 30% plant-infused fiber |
| Foam Layers | Three-layer foam system including NanoGEL memory foam, transition foam, and high-density support foam |
| Certifications | [‘CertiPUR-US’, ‘OEKO-TEX’, ‘ISPA’] |
| Support Features | Ergonomic pressure point relief, spinal alignment, reinforced edges |
| Expansion Time | Expands more quickly when unboxed and slept on sooner |
Many people assume that a king-sized mattress in a box is just a big, soft surface that traps heat. But with the Novilla 14″ King Gel Memory Foam Mattress, I found that couldn’t be further from the truth.
From the moment I unboxed it, I was impressed by how quickly it expanded and how sleek the cool-touch nylon cover felt under my hand.
The first thing I noticed was how breathable the NanoGEL memory foam felt when I pressed into it. It actively wicks away moisture and heat, keeping me cool even on warmer nights.
The three-layer foam system provides excellent support, contouring to my body without sinking too much, which is perfect for alleviating pressure points.
Switching positions was effortless because of how responsive the foam was. I especially liked how firm yet cozy the transition layer felt—no feeling of being swallowed up, just proper spinal alignment.
The reinforced edges gave me confidence sitting near the perimeter without feeling like I might roll off.
Moving around during sleep didn’t disturb my partner, thanks to solid motion isolation. And knowing it’s certified safe with a long 10-year warranty and a 100-night trial gave me peace of mind.
Plus, the mattress’s quick expansion meant I could enjoy that fresh, cool sleep surface sooner rather than later.
Overall, this mattress defies the misconception that large beds are hot and uncomfortable. It delivers a cool, supportive, and durable sleep experience that makes every night restful and refreshing.
12-Inch King Hybrid Mattress with Cooling Gel & Pocket Coils
- ✓ Excellent motion isolation
- ✓ Cooler sleep surface
- ✓ Easy setup and compatibility
- ✕ Slightly firm for some
- ✕ Edge support could improve
| Mattress Thickness | 12 inches |
| Coil Count | Over 1000 individually wrapped pocket coils |
| Support Zones | 7-zone support system with targeted pressure relief |
| Cooling Technology | Breathable fabric maintaining a 10°F cooler sleep surface |
| Material Composition | Memory foam and pocketed springs, fiberglass-free construction |
| Compatibility | Fits 99% of bed frames including box springs, platforms, and foundations |
Imagine waking up after a warm night, only to find that your mattress stays surprisingly cool and supportive, even when the room’s temperature climbs. I set up the 12-Inch King Hybrid Mattress with Cooling Gel & Pocket Coils right in my bedroom, unrolling it on my box spring.
Within a couple of days, it had fully expanded, and I was eager to test its claims of comfort and breathability.
The moment I lay down, I noticed how plush yet firm it felt. The combination of memory foam and pocket coils offered a luxurious feel, contouring perfectly to my body’s curves.
It’s clear that the 7-zoned support system targets key pressure points, especially around my hips and shoulders, providing relief I didn’t expect from a mattress at this price point.
What really stood out was how still I felt even when my partner moved around at night. Thanks to the individually wrapped coils, motion transfer was minimal—silent nights are now possible even with a restless sleeper.
Plus, the breathable fabric kept me cool, and I genuinely felt the surface was cooler than my old mattress, especially during those hot summer mornings.
Setup was a breeze—just unroll, unwrap, and wait. No tools needed.
It fit perfectly on my existing bed frame, and I appreciated how quickly it expanded to its full 12-inch height. Overall, this mattress combines comfort, support, and cooling in a way that makes every night a restful escape.
What Should You Look for When Choosing the Best King Cooling Mattress?
When selecting the best king cooling mattress, consider the following key factors:
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Material: Look for mattresses made with breathable materials like gel-infused memory foam, latex, or hybrid designs that combine foam and innerspring support. These materials promote airflow and help dissipate heat.
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Cooling Technologies: Check for specific cooling features such as phase change materials (PCMs), which absorb and release heat, or specialized fabrics like breathable covers made from moisture-wicking or cooling polyester blends.
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Firmness Level: The firmness of the mattress should match your sleeping position and comfort preferences. Side sleepers may prefer softer mattresses, while back and stomach sleepers may need firmer options for adequate support.
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Motion Isolation: Consider how well the mattress absorbs movement. Good motion isolation can be beneficial for couples, ensuring that movements during the night do not disturb your partner.
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Trial Period and Warranty: A generous trial period allows you to test the mattress at home, while a solid warranty indicates the manufacturer’s confidence in the product’s longevity and performance.
Evaluate these factors alongside personal preferences to find the perfect king cooling mattress that enhances your sleep experience.
How Do Different Materials Impact the Cooling Properties of King Mattresses?
Different materials significantly influence the cooling properties of king mattresses, affecting sleep comfort and temperature regulation.
- Memory Foam: Memory foam is known for its contouring properties, which can trap heat and lead to a warmer sleep experience. However, many modern memory foams incorporate cooling gels or are infused with materials that enhance breathability, thus improving their thermal regulation.
- Latex: Latex mattresses are naturally cooler than traditional memory foam due to their open-cell structure and inherent breathability. They allow for better airflow and heat dissipation, making them a great choice for individuals who tend to sleep hot.
- Innerspring: Innerspring mattresses utilize a coil system that promotes airflow, significantly reducing heat retention. These mattresses are generally cooler than foam options, as the space between coils allows for better ventilation, keeping the sleeper more comfortable.
- Hybrid: Hybrid mattresses combine the benefits of foam and innerspring systems, often featuring a layer of gel-infused memory foam or latex over a coil base. This design typically offers both support and cooling properties, making them versatile for various sleep preferences.
- Cooling Fabrics: The outer fabric of a mattress can also impact its cooling ability. Materials like Tencel, bamboo, and other moisture-wicking fabrics help regulate temperature and wick away heat, enhancing the cooling sensation during sleep.
- Phase Change Materials (PCM): Some mattresses incorporate PCM technology, which absorbs and releases heat as needed. These materials actively regulate temperature, providing a cooler sleep surface during warmer nights and helping to maintain a comfortable sleeping environment.
What Are the Benefits of Memory Foam in King Cooling Mattresses?
The benefits of memory foam in king cooling mattresses include enhanced comfort, temperature regulation, and support for sleep posture.
- Enhanced Comfort: Memory foam conforms to the body’s shape, providing personalized support that alleviates pressure points. This unique feature allows for a cushioned feel that can help reduce tossing and turning throughout the night.
- Temperature Regulation: Many king cooling mattresses incorporate gel-infused memory foam, which helps dissipate heat and maintain a comfortable sleeping temperature. This is particularly beneficial for those who tend to sleep hot, as it offers a cooler sleep surface compared to traditional memory foam.
- Support for Sleep Posture: Memory foam is known for its ability to support the natural alignment of the spine. This support is crucial for preventing back and neck pain, making it easier to maintain a healthy sleep posture throughout the night.
- Motion Isolation: Memory foam excels in absorbing movement, which is ideal for couples sharing a king mattress. This characteristic minimizes disturbances from a partner’s movements, allowing for a more restful sleep experience.
- Durability: High-quality memory foam is often durable and resilient, maintaining its shape and support over time. This longevity makes it a worthwhile investment for a king cooling mattress, ensuring consistent comfort for years.
How Does Latex Enhance the Cooling Effect in King Mattresses?
Latex enhances the cooling effect in king mattresses through various properties and features.
- Breathability: Latex foam is naturally aerated due to its open cell structure, allowing for better airflow. This ventilation helps dissipate heat, keeping the surface of the mattress cooler throughout the night.
- Moisture-wicking properties: Latex materials can absorb moisture and wick it away from the body. This feature helps regulate temperature and prevents the buildup of heat, which is especially beneficial for hot sleepers.
- Durability and longevity: Latex mattresses tend to maintain their shape and performance over time, which includes their cooling properties. Unlike other materials that may sag or lose effectiveness, latex consistently provides support and breathability for extended periods.
- Natural temperature regulation: Natural latex is derived from rubber trees and retains a cooler surface temperature compared to synthetic materials. This inherent quality ensures that the mattress remains comfortable even in warmer climates or seasons.
- Supportive yet soft feel: The combination of support and softness in latex allows for a comfortable sleeping experience without trapping heat. This balance helps maintain a cool sleeping environment while providing necessary support for the body.
What Role Do Innerspring Systems Play in Cooling King Mattresses?
Support and Comfort: The supportive nature of innerspring coils helps to maintain proper spinal alignment, which is essential for a comfortable night’s sleep. By distributing body weight evenly, these systems can also prevent pressure points that might otherwise lead to discomfort and overheating.
Material Compatibility: Many innerspring mattresses are combined with cooling gel foams or breathable fabrics that enhance their cooling capabilities. These materials work in conjunction with the coil system to create a more effective temperature-regulating environment.
Heat Dissipation: The construction of innerspring mattresses allows for effective heat dissipation since the coils create space between the mattress layers. This design promotes a cooler sleeping surface by allowing heat to escape rather than being trapped within the mattress.
Which Features are Essential for a King Cooling Mattress?
Moisture-wicking properties are vital for maintaining a dry sleep surface. Fabrics that draw sweat away from the body prevent discomfort and help regulate body temperature, making for a better night’s rest.
Breathable construction is key to ensuring that air can flow through the mattress. Designs that incorporate open-cell foam or layered materials allow heat to escape, further enhancing the cooling effect.
Pressure relief is essential for comfort, as it allows the mattress to adapt to the sleeper’s body shape. This support helps reduce pain and discomfort, particularly for side sleepers who may experience pressure on their hips and shoulders.
Durability is important because a mattress that wears out quickly may lose its cooling properties. Investing in a well-constructed mattress ensures that it will provide long-lasting support and comfort.
Motion isolation is crucial for couples, as it helps reduce the disturbance caused by one partner’s movements during the night. This feature allows both individuals to enjoy uninterrupted sleep, which is particularly beneficial in a larger king-sized mattress.
What Benefits Can You Expect from Sleeping on a King Cooling Mattress?
The benefits of sleeping on a king cooling mattress are numerous and can greatly enhance your sleep quality.
- Temperature Regulation: King cooling mattresses are designed with materials that promote airflow and dissipate heat, ensuring that you stay cool throughout the night. This is particularly beneficial for individuals who tend to sleep hot or live in warmer climates.
- Enhanced Comfort: These mattresses often incorporate advanced foam technologies or gel-infused layers that provide a plush yet supportive feel. This combination helps alleviate pressure points, allowing for a more restful sleep experience.
- Improved Sleep Quality: By maintaining a comfortable sleeping temperature and providing adequate support, king cooling mattresses contribute to deeper sleep cycles. This leads to better overall rest, increased energy levels, and improved mood during the day.
- Durability and Longevity: Many cooling mattresses are made with high-quality materials that are designed to withstand wear and tear. Investing in a king cooling mattress can provide long-term benefits, reducing the need for frequent replacements.
- Motion Isolation: King cooling mattresses typically feature layers that absorb movement, making them an excellent choice for couples. This means that when one partner moves or gets up, the other is less likely to be disturbed, allowing for uninterrupted sleep.
- Allergen Resistance: Many cooling mattresses utilize hypoallergenic materials that resist dust mites, mold, and other allergens. This is especially advantageous for individuals with allergies or respiratory issues, promoting a healthier sleep environment.
Which King Cooling Mattresses Are Highly Rated by Customers?
The best king cooling mattresses highly rated by customers include:
- Tempur-Pedic TEMPUR-breeze: This mattress is designed specifically for cooling, utilizing TEMPUR material that absorbs heat and has a special cooling cover. Customers appreciate its ability to maintain a comfortable sleeping temperature, even in warm conditions, while also providing excellent support and pressure relief.
- Leesa Legend: The Leesa Legend features a combination of premium foam and support layers that promote airflow and breathability. Many users report a significant reduction in heat retention, making it a favorite for those who sleep hot while still offering a plush feel that conforms to the body.
- Purple Hybrid Premier: This mattress incorporates a unique hyper-elastic polymer grid that allows for optimal airflow, reducing heat buildup. Customers love its responsive surface and the way it keeps them cool without sacrificing support or comfort during the night.
- Nectar Premier Copper: The Nectar Premier Copper mattress has infused copper in its foam layers, which not only helps with cooling but also has antimicrobial properties. Users find it to be a great option for those who tend to overheat, as it provides a cool sleeping surface along with a plush feel.
- Bear Hybrid: This mattress features a combination of foam and pocketed coils, designed to enhance airflow and breathability. Customers highlight its cooling technology that helps regulate temperature while also providing excellent support for recovery after workouts, making it popular among athletic individuals.