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Sweetnight CoolNest 12 Inch Full Size Mattress,Cooling Memory Foam Mattress

Based on 1,305 reviews
Condition: New
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$349.99

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Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Nov 7
Order within 9 hours and 56 minutes

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At a glance

Condition
New
Color
Grey & Blue
Size
Full
Set
12 in
Model
SN12FGYMMPRO23
Dimensions
75 x 54 x 12 in
Weight
51.7 lb

Features 5

  • CoolNest System for a Cooler Night - The CoolNest 12 inch full size mattress features our innovative CoolNest System, combining PCM high-resilience foam with gel-infused memory foam for layered cooling comfort. This advanced system helps dissipate heat and maintain a cooler surface throughout the night, creating a cooler and more comfortable sleep environment for hot sleepers.
  • 5-Zone Support for Pressure Relief - Engineered with a 5-zone design, this memory foam full size mattress integrates support foam and comfort foam to help cushion pressure areas from head to toe. It helps redistribute pressure while maintaining stability and balanced support for enhanced comfort. Recognized by the American Chiropractic Association (ACA), it's designed to promote a more restful sleep experience.
  • Motion Isolation for Undisturbed Sleep - Constructed with multiple layers of memory foam, the CoolNest 12 inch full bed mattress helps absorb motion and reduce vibrations. Additionally, 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 Cooler Comfort - The CoolNest cover incorporates 3D-woven technology, featuring a ventilation pore design that improves breathability by 35% compared to standard fabrics. Also, the PCM high-resilience foam with a hollow structure promotes 3X airflow. Together, these features help to wick away moisture and adapt to body temperature for a cooler, drier sleep surface.

Specs 34

Brand Sweetnight
Size Full
Product Dimensions 75"L x 54"W x 12"Th
Item Weight 51.7 pounds
Item Firmness Description Medium
Top Style Tight Top
Cover Material Polyester
Number of Layers 6

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Nov 7

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.

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Top Amazon Reviews


DUPE for Comparable High-End Mattress - COMFY and COOL!
Color: Pro-greyblue Size: King (U.S. Standard) Set name: 16 Inch
We’ve officially been sleeping on this mattress for 1 week. It has exceeding expectations. With previous mattresses, I have needed to get adjusted to the mattress before feeling comfortable. NOT WITH THIS ONE. It’s cause zero pain, and actually relieved my previous pain caused by my 8-10 year old mattress which was from the beginning ill-sized and thin. Suitability: This one is suitable for co-sleepers, side and back sleepers (I share with my husband and we’re are combo sleepers). It’s a great value for money: I have slept on a more expensive well-known brand, and I would say this a dupe at nearly half the cost, if not more. Inflation: I have had foam mattresses in the past which took 24-48 hours to inflate and de-gas, and this one took less than a day for us to be able to sleep on it comfortably, and no longer than 2 days for the full inflation and had ZERO gas/toxic smell. It’s shaped perfectly, no indented spots after full inflation, and sinking is minimal, definitely medium-firm. I am happy we got the PRO 16” rather than the original smaller one. It’s been great so far. OH and it keeps us COOL throughout the night, no night sweats. ... show more
Reviewed in the United States on August 26, 2026 by Ashley

Very Comfortable and Great Support
Color: Grey & Blue Size: Queen (U.S. Standard) Set name: 14 Inch
I’m really happy with this mattress so far. The 14-inch design gives the bed a substantial, supportive feel without being overly firm. I like the medium feel because it provides a good balance of comfort and support, especially around the shoulders, back, and hips. One of my favorite features is the cooling design. The knitted cover feels soft and breathable, and the combination of cooling materials and gel-infused memory foam gives the mattress a fresher feel than many traditional memory foam mattresses. It also has several layers of foam, which makes the overall construction feel well thought out and sturdy. The 5-zone support design is another nice touch. The mattress seems to provide more targeted support in different areas of the body while still allowing enough cushioning for comfort. The edges also feel stable and supportive. Overall, this mattress offers a comfortable balance of softness, support, and breathability. The 14-inch height gives it a substantial look, and the construction feels more premium than I expected. A great option if you prefer a medium-feel memory foam mattress with cooling features. ... show more
Reviewed in the United States on September 10, 2026 by Lynn

Great quality matters.
Color: Grey & Blue Size: King (U.S. Standard) Set name: 14 Inch
We have been using the Sweetnight CoolNest 14” King Mattress and overall, we are very impressed with it. The 14-inch thickness is just right, and the medium firmness feels accurate. It provides excellent support without feeling too hard or sagging. I especially like waking up without pressure points, which is a big win. Setup was easy, and the mattress expanded nicely after unpacking. After sleeping on it for a while, we have noticed that we are sleeping much better and waking up feeling more rested. The quality is impressive for the price, and it honestly feels like a much more expensive mattress. Overall, this is a great mattress and definitely worth the money. Highly recommended! ... show more
Reviewed in the United States on September 1, 2026 by Gus Herrera

Best night sleep in a long time
Color: Grey & Blue Size: King (U.S. Standard) Set name: 14 Inch
I got this mattress about 10 days ago and delayed changing it because I’ve had my other mattress for so long and worried I would wake up with my back hurting or stiff from the change BUT I had to yesterday and last night was the absolute best night sleep I’ve had in a very long time!! The first pic was minutes after I had opened it and put it on my bed- it started getting normal shape quick. The second pic is this morning- less than 24 hours after opening it (I opened it late yesterday afternoon. It has been cool to the touch every time I’ve touched it- I slept cool all night and it still felt cool when I woke up this morning. I slept so good last night I didn’t move at all- I don’t move much in my sleep usually anyway but I do usually wake up with my back hurting from not moving much- I was shocked that when I did wake up this morning, I had zero discomfort, and I actually slept an hour later than I usually do. My 120 pound English labrador sleeps in the bed with me and he will wake me up moving around, but I never felt him move last night. I really think he slept better too. The mattress is soft but firm and does relieve the pressure points- it is the perfect mix of firm yet soft and the cooling is just a bonus. If you’re like me going back-and-forth, not sure this is a great mattress- trust me it is amazing! I can’t wait to see how much it improves over the next day or two like the instructions said it would be fully inflated within 72 hours. I am so happy with my purchase! ... show more
Reviewed in the United States on July 19, 2026 by Jennifer Carpenter

Cool, Supportive & Comfy
Color: Grey & Blue Size: Queen (U.S. Standard) Set name: 14 Inch
The mattress looks really premium and feels great overall. At first, it seemed a little soft right out of the box, but after letting it sit for a day, the support felt just right. It’s not too firm, but still very supportive. Lying on it lets my muscles fully relax. The cooling cover really helps keep the bed cool, especially in summer. ... show more
Reviewed in the United States on August 23, 2026 by wz

Great Support and Cooling, but Surface Could Be Better
Color: Grey & Blue Size: King (U.S. Standard) Set name: 12 Inch
I’ve been using the Sweetnight CoolNest 12” King Mattress for a bit now, and overall I’m impressed. The thickness is just right, the medium firmness feels accurate, and it gives excellent support without sagging. I wake up without pressure points, which is a big win. The cooling performance is genuinely good — it stays comfortable through the night. For the price, the value is honestly hard to beat, and delivery was smooth and on time. A couple of drawbacks: the top surface is not quilted, so it feels very flat compared to mattresses with a cushioned top layer. Also, the cover isn’t cotton, so it has a slightly synthetic/artificial feel. Not a dealbreaker, but worth noting. Overall, a great value mattress with solid support and cooling, just not the plushest surface finish. ... show more
Reviewed in the United States on May 29, 2026 by NRI Desi Bong

soft and comfortable
Color: Grey & Blue Size: King (U.S. Standard) Set name: 14 Inch
The cool surface is perfect for sleeping on in the summer; it's very smooth, the fabric is exceptionally comfortable, and it's removable and washable, which is very convenient. It offers good support, has a medium firmness, and is soft and comfortable. The quality is excellent; it's made of memory foam, rebounds quickly, and still provides good support. It's very well made. ... show more
Reviewed in the United States on August 30, 2026 by sophia Grace

Cool mattress for the staff room
Color: Grey & Blue Size: King (U.S. Standard) Set name: 14 Inch
W bought this king mattress for my gyms break room so trainers can crash between clients. First night one of my coaches passed out on it after leg day and said his back didnt feel wrecked, so the zoning and support clearly work. Cooling is decent, nobody woke up sweaty, but its not ice cold or anything. Edge support could be better, you sink a bit when you sit to tie your shoes. Setup was simple, unboxed it, let it puff up, and we were using it that night. For the price and the abuse it takes from rotating staff, it holds up pretty well. ... show more
Reviewed in the United States on September 22, 2026 by Laura B. Allen
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