Sweetnight CoolNest 14 Inch California King Mattress, Cooling Memory Foam Mattress for Cool Night Sleep, 5-Zone Ergo Support for Pressure Relief, Medium, CertiPUR-US Certified
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Availability:
In Stock.
Arrives
Thursday, Mar 26
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Color: Grey & Blue
Size: California King
Style: 14 Inch
Features
- CoolNest System for a Cooler Night - The CoolNest 14 inch cal king mattress features our innovative CoolNest System, combining PCMflux high-resilience foam with gel-infused memory foam to deliver a dual cooling technology. This advanced system helps actively regulate temperature throughout the night, reducing overheating and night sweats for hot sleepers.
- 5-Zone Ergo Support for Pressure Relief - Engineered with a 5-zone design, this gel memory foam mattress integrates support foam and comfort bars to target pressure points from head to toe. It helps redistribute pressure while maintaining stability, promoting proper spinal alignment and back pain relief. Endorsed by the American Chiropractic Association (ACA), it's designed for restorative sleep.
- Motion Isolation for Undisturbed Sleep - Constructed with multiple layers of memory foam, the CoolNest cali king mattress has the advantage of foam on absorbing noise and vibrations. Additionaly, These layers work synergistically to minimize motion transfer, so you're less likely to be disturbed whether your partner shifts positions or gets up during the night. Wake up feeling more refreshed.
- Enhanced Breathability for Ultimate Comfort - The CoolNest cover incorporates 3D-woven technology, featuring an ventilation pores design that improving breathability by 35% compared to standard fabrics. Also, the PCMflux high-resilience foam with hollow structure promotes 3X airflow. Thereby these help to wick away moisture and adapt to body temperature for a cooler, drier sleep surface.
- Healthy Sleep & Cal King Mattress in a Box - The Sweetnight CoolNest gel memory foam mattress features CertiPUR-US certified foams and OEKO-TEX certified cover, which provides a safer and healthier sleep environment. The 14 inch california king cooling mattress is compressed in a box for easy setup. Additionally, it comes with a 10-year protection. Please allow the sweetnight mattress to fully expand for 72 hours.
Description
Sweetnight is a mattress and sleep solutions company that provides premium products to ensure a great night's sleep. We are committed to maximizing sleep comfort so you can relax and feel rejuvenated the next day. Our products are made with quality materials, with CertiPUR-US certification, and are all fiberglass free. Try our range of memory foam and hybrid mattresses today! The CoolNest Mattress incorporates the innovative CoolNest System, combinating PCM and gel memory foam. Effectively reducing overheating and night sweats. The 5-zone design integrates support foam and comfort bars, which offers a great combination of support and pressure relief, giving you a balace of support and comfort. What is in the box? 1x Sweetnight CoolNest Memory Foam Mattress 1x Sweetnight Opener 1x Manual & Warranty Card Note: - Please allow 48-72 hours for your mattress to regain its full shape. The rate of expansion is related to the temperature of the room. Most memory foam mattresses will expand faster in a warm room and will take longer in colder temperatures. - It's normal that there is an odor after unpacking the mattress. Place the mattress in a ventilated space for a few days and the smell will gradually disappear.
Brand: Sweetnight
Size: California King
Product Dimensions: 84"L x 72"W x 14"Th
Item Weight: 73.1 Pounds
Item Firmness Description: Medium
Top Style: Tight Top
Cover Material: Polyester
Number of Layers: 6
Fill Material: Gel Memory Foam, High Density Foam, Memory Foam
Special Feature: Breathable, Low Motion Transfer, Pressure Relief, Temperature Regulating
Item Weight: 73.1 pounds
Product Dimensions: 84 x 72 x 14 inches
Item model number: SN14CLKGYMMPRO23N1
Date First Available: September 11, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Mar 26
Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Grey & Blue
Size: King (U.S. Standard)
Style: 14 Inch
I hate when people say “for the price, it’s a great mattress.” You could charge $2,500 for this mattress and it would still be worth every dollar. It’s that comfortable. It feels genuinely luxurious the moment you lay down. My sleep quality improved immediately, and I wake up feeling rested instead of overheated. This mattress sleeps incredibly cool—like, noticeably cool to the touch. Honestly, if you’re reading this review, your mattress search is over. Pair it with bamboo sheets and you’ll feel like you’re waking up in a Four Seasons suite every morning. Comfortable, supportive, and impressively cool—this mattress delivers on everything.
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Reviewed in the United States on February 7, 2026 by Denise Bushey
Color: Grey & Blue
Size: King (U.S. Standard)
Style: 14 Inch
I was honestly a little nervous ordering a mattress online, but this one completely surprised me. It expanded quickly and had very little smell. The 14-inch thickness feels substantial, and it fits perfectly on my metal bed frame. I love the balance of support and comfort — it’s not too soft, not too firm. I usually wake up with lower back tension, but since switching to this mattress, I’ve been sleeping much deeper and waking up without stiffness. The cooling top actually makes a difference too; it doesn’t trap heat like my old memory foam did. For the price, the quality is impressive. It looks clean and modern in my bedroom and feels like a much more expensive mattress. Definitely a great buy!
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Reviewed in the United States on February 15, 2026 by Winn Winn
Color: Grey & Blue
Size: King (U.S. Standard)
Style: 14 Inch
The Sweetnight CoolNest 14 inch king size mattress has truly improved my sleep quality. From the first night, I noticed a significant difference in how cool and comfortable I feel. The cooling memory foam layer really helps regulate temperature, which makes a noticeable difference during warmer nights. The medium feel is just right for me, offering both softness for comfort and enough support so I do not wake up with aches. The 5-zone ergonomic support design works exactly as described. Each area of the mattress targets pressure relief where it is needed most, especially under my back, hips, and shoulders. I no longer wake up with stiffness or soreness, and getting a restful night’s sleep has become much easier. The foam layers also contour beautifully to my body without feeling too sinky or unstable. I appreciate that this mattress is CertiPUR-US certified because it gives me confidence that the materials are safe and free from harmful chemicals. The overall build quality feels very solid and durable, and it looks great on my bed frame. Setup was simple and it expanded quickly once unboxed. Overall this mattress delivers on comfort, cooling, and support. It feels luxurious without being too firm or too soft, and it has made a real difference in my nightly rest. I highly recommend it for anyone seeking a cooler, more supportive sleep surface. Five stars.
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Reviewed in the United States on January 21, 2026 by William Lu William Lu
Color: Grey & Blue
Size: King (U.S. Standard)
Style: 12 Inch
This mattress is very comfortable with just the right medium firmness. It provides good support for my back and hips, and I can really feel the cooling effect at night. Easy to set up and no strong smell after unpacking. Overall, great quality for the price.
Reviewed in the United States on February 5, 2026 by Xiangrui Meng Xiangrui Meng
Color: Grey & Blue
Size: Queen (U.S. Standard)
Style: 14 Inch
I love everything about this matress. It comes in with compressed packaging makes it easy to move and assemble. Just cut open the package and let it sit for a while it will fully expand. The thickness jus what I really like. It is soft but firm enogh to support my whole boy. Let my body relax during the night. The top layer gives it a cool touch which feels very nice. Overall, a very confortable and luxurious mattress.
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Reviewed in the United States on February 18, 2026 by Jieluy Jieluy
Color: Grey & Blue
Size: Queen (U.S. Standard)
Style: 16 Inch
The media could not be loaded. I really really love this mattress. It is super relaxing. I like it’s firmness, durability, and functionality. I couldn’t sleep on any mattresses before and was afraid the same thing will happen again and it will be waste of money but was not the case. I can sleep for hours without any discomfort. I got the 16 inch queen size and left it on the bed for 24 hours to reach that 16 inches but I couldn’t get that as you see in the video and I’m not sure why. It is very heavy so if you are one person just ask for help for adjusting it on the bed. Overall, I love everything about this mattress now.
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Reviewed in the United States on December 23, 2025 by It’stamo
Color: Grey & Blue
Size: King (U.S. Standard)
Style: 14 Inch
I’ve always preferred firm spring mattresses and honestly didn’t think memory foam would be for me. I had this idea that it would feel too soft, sink too much, or sleep hot. I bought the Cooling King Memory Foam Mattress mainly to give it a try, and after using it for a month, I’ve completely changed my mind. The first few nights took a little getting used to because the foam contours to your body differently than a traditional spring mattress. But after about a week, I started noticing that I was waking up feeling more relaxed. I used to have some neck and lower back stiffness in the mornings, and that’s pretty much gone now. The support is much better than I expected—it feels soft on top but still supportive underneath. One thing I didn’t expect was how evenly it distributes weight across the surface. Instead of feeling pressure in specific areas like my shoulders or hips, it feels more balanced and cushioned without losing that firm base I like. I also noticed that I don’t toss and turn as much during the night, probably because my body feels more supported in a natural position. Even when I switch sleeping positions, the mattress adjusts quickly without feeling like I’m stuck or sinking too deep. That combination of comfort and stability has made a noticeable difference in the overall quality of my sleep. I was also worried about heat retention, but so far it hasn’t felt overly warm or stuffy at night. It’s actually been quite comfortable temperature-wise. Overall, I’m genuinely surprised at how much I like it. If you’ve always been a firm spring mattress person like me and are hesitant about memory foam, it might be worth trying. It definitely changed my opinion.
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Reviewed in the United States on February 21, 2026 by LorrisNetork