Sweetnight CoolNest 16 inch King Mattress, Cooling Gel King Size Memory Foam Mattress for Cool Night Sleep, 5-Zone Ergo Support for Pressure Relief, Medium Firm, CertiPUR-US Certified
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Availability:
12 left in stock
Arrives
Friday, Sep 5
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Color: Grey & Blue
Size: King (U.S. Standard)
Style: 16 Inch
Features
- CoolNest System for a Cooler Night - The CoolNest 16 inch 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 king size 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 16 inch cooling memory foam 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 & 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 16 inch memory foam king 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.
Brand: Sweetnight
Size: King (U.S. Standard)
Product Dimensions: 80"L x 76"W x 16"Th
Top Style: Tight Top
Cover Material: Polyester
Number of Layers: 6
Fill Material: Gel Memory Foam, Memory Foam, High Density Foam
Special Feature: Temperature Regulating, Pressure Relief, Low Motion Transfer, Breathable
Color: Grey & Blue
Model Name: SN-M01518
Item Weight: 80.3 pounds
Product Dimensions: 80 x 76 x 16 inches
Country of Origin: Indonesia
Item model number: SN16KGYMMPRO23
Date First Available: April 11, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, Sep 5
Yes, absolutely! You may return this product for a full refund within 100 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: Full
Style: 12 Inch
I read a lot of the reviews and some were concerned that the corners did not expand properly. But the one that mattered the most I think was the one who wrote he tried to sleep on it before the 72 hours after opening. I waited the full 72 hours and have been pleased ever since. It’s very comfortable and the cooling top works very well. This may not be the best mattress out there, but because of the way I’m using and the the price point this is the best mattress for me. The size was great for me. I did not need anything bigger than full. I didn’t notice a smell like someone said they did. I never had that issue. The firmness is exactly what I expected.
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Reviewed in the United States on August 2, 2025 by F. Martin
Color: Grey & Blue
Size: Queen (U.S. Standard)
Style: 14 Inch
We took a risk buying an expensive mattress online, but it paid off. The mattress arrived on time, was easy to “assemble” (only had to cut off the plastic cover), and then we let it air for 2 days before using it. There was no off gassing smell as other reviewers noted. The mattress looks great and is extremely comfortable. I was initially worried about it being too soft (may have laid on it for a couple of minutes as soon as I got it out), but after it sat for 48 hrs it firmed up nicely. It absolutely has helped alleviate our respective back pains, which is why we bought this mattress. Waking up to no more back pain has made this purchase worth it. I love that it doesn’t transfer motion as I get up frequently during the night for baby duty. There’s been no sinking, and I fully expect this mattress will last a long time. If anything changes, I’ll update the review.
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Reviewed in the United States on June 13, 2025 by Kate C.
Color: Grey & Blue
Size: King (U.S. Standard)
Style: 14 Inch
I can confidently say it’s one of the best sleep investments I’ve made. As someone who tends to sleep hot, I was specifically looking for a mattress that could regulate temperature without sacrificing comfort—and this one delivers on all fronts. The cooling technology really works. I no longer wake up in the middle of the night feeling overheated or sweaty. The mattress stays noticeably cooler to the touch, thanks to its breathable cover and gel-infused memory foam. It strikes a perfect balance between soft and supportive: plush enough to cushion pressure points, yet firm enough to keep my spine aligned. Unboxing was easy, with minimal off-gassing, and it fully expanded within a few hours. My partner and I also appreciate the excellent motion isolation
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Reviewed in the United States on May 11, 2025 by Zay
Color: Grey & Blue
Size: Queen (U.S. Standard)
Style: 12 Inch
Let's start off by saying I was looking for a cloud feeling mattress. Found a $1500 one and decided to look on Amazon. Found this. Looked similar to expensive one. The reviews OMGosh! Amazing! So I took a chance. THE BEST SLEEP EVER!!! It is NOT hard but not soft but it is PERFECT. Now remember I wanted a cloud feel. I wouldn't trade this bed for anything. I sleep sound. No aches and pains. Now I did buy a grounding mat so between the two I sleep thru the night. Never have I before. BEST investment ever!!! No smells.... Forever in love!!!
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Reviewed in the United States on July 29, 2025 by Krys
Color: Grey & Blue
Size: King (U.S. Standard)
Style: 14 Inch
I'm really happy with this mattress. Before my bed sank in the middle and I didn't rest well, but since I have it, that changed completely. It is firm, comfortable and adapts very well to the body without deforming. In addition, the delivery was in record time, much faster than I expected. I have noticed a big difference in the quality of my sleep. I highly recommend it if you are looking for support and comfort at the same time. Very satisfied with my purchase!
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Reviewed in the United States on August 3, 2025 by Maray Veranes
Color: Grey & Blue
Size: King (U.S. Standard)
Style: 14 Inch
I am very pleasantly surprised by how awesome this mattress is. It’s firm with just the right amount of support and just the right amount of softness. I used to turn over on my mattress a lot and I would feel almost immediate pain right away in my shoulders. This mattress makes it the complete opposite to turn over, I actually feel excited to turn over because it’s so comfortable and I have no pain. Way worth the $, I can’t believe more haven’t bought it.
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Reviewed in the United States on June 27, 2025 by mrs kimberly kellow
Color: Grey & Blue
Size: Queen (U.S. Standard)
Style: 12 Inch
I’ve been sleeping on the Sweetnight CoolNest 12 Inch Queen Mattress for a few weeks now, and I can confidently say it has exceeded my expectations. The medium-firm feel is just right—not too hard, not too soft. The cooling gel memory foam lives up to its name, helping regulate temperature through the night so I don’t wake up sweaty like I used to with my old mattress. The 5-zone ergonomic support really makes a difference. I feel proper pressure relief on my hips and shoulders, and I no longer wake up with back pain. It also has that nice balance of firmness for support but still contours enough to feel cozy. It came well-packaged, expanded quickly, and had no strong chemical smell. Plus, it’s CertiPUR-US certified, which gives peace of mind about its quality and safety. For its price, it feels like a luxury mattress without the luxury price tag. Highly recommend this to anyone needing better sleep and a cooler night’s rest!
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Reviewed in the United States on May 5, 2025 by GSR
Color: Grey & Blue
Size: Queen (U.S. Standard)
Style: 14 Inch
Allowed it to expand 48 hours. First night, We realized it’s definitely on soft side, not firm at all. Did not provide any back support at all. Smaller that our previous queen bed. I would not recommend this
Reviewed in the United States on July 20, 2025 by zzeusba