12 Inch Mattress Twin Size, Gel Memory Foam Mattress for Cooling, Medium Firm Pressure Relief, CertiPUR-US Certified, with Removable Cover
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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 5 left in stock, order soon!
Arrives
Jul 22 – Jul 24
Recently Viewed
Color: Grayish Black
Item Thickness: 12 Inches
Size: Twin
Features
- Cooling Luxury Twin Mattress - Our 12 inch gel memory foam mattress boasts a sleek, modern design that elevates any bedroom decor, providing cloud-like comfort and essential cooling gel infusion for a truly restful night's sleep.
- Advanced Multi-Layer Comfort & Pressure Relief - Discover the science of superior sleep! Our expertly engineered multi-layer construction features a cooling gel memory foam top layer that conforms to your body, relieving pressure points in shoulders, hips, and back. Beneath lies a transition foam layer for optimal spinal alignment, all supported by a high-density base support foam core. This ergonomic design ensures all-night comfort and pain relief.
- CertiPUR-US Certified & Breathable Support - Sleep soundly on safe, high-quality materials! This CertiPUR-US certified gel memory foam mattress is made without harmful ozone depleters, heavy metals, or formaldehyde. The open-cell structure and cooling gel technology enhance airflow and breathability, effectively dissipating body heat to prevent overheating and keep you cool and comfortable all year round.
- Convenient Removable & Washable Cover - Maintain your mattress freshness effortlessly! The soft, stretch-knit cover is not only hypoallergenic and breathable, but it's also easily removable and machine washable. Simply unzip, toss it in the wash, and enjoy a clean, hygienic sleep surface. This removable cover makes mattress care simple and hassle-free.
- Ultimate Comfort for Everyone (Medium-Firm Feel) - Achieve the perfect balance of softness and support! Engineered with a universally comfortable medium-firm feel, this gel infused memory foam mattress provides just the right amount of body contouring and lumbar support. It's ideal for all sleep positions (back, side, stomach), minimizes motion transfer for couples, and delivers durable comfort night after night for your best sleep ever.
Brand: Wellynap
Size: Twin
Product Dimensions: 75"L x 39"W x 12"Th
Item Weight: 42 Pounds
Item Firmness Description: Medium Firm
Top Style: Euro Top
Cover Material: Polyester
Number of Layers: 6.0
Fill Material: Gel Memory Foam, High Density Foam
Special Feature: Breathable, Durable, Fire Retardant, Pressure Relief, Removable Cover
Product Dimensions: 75 x 39 x 12 inches
Item Weight: 42 pounds
Manufacturer: Wellynap
Item model number: U12A12T
Date First Available: July 25, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jul 22 – Jul 24
Yes, absolutely! You may return this product for a full refund within 30 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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Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Color: White & Blue
Item Thickness: 4 Inches
Size: Queen
Just as I expected. Pretty comfortable too. My back didn't hurt the next morning. I wish it was a little bit wider because it doesn't reach the sides of the frame for my particular pull out couch. Length is perfect! I didn't see a way to tie it or strap it to the frame but it doesn't move around so no worries. I would recommend this over the all-white version because it's cheaper and you're just going to put a fitted sheet over it so who cares if the bottom is blue?! Overall, I would recommend this mattress if you are looking for a cheap and comfortable mattress for your rarely used pull out couch. If you are going to sleep on it every night then I'd recommend something a little more robust.
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Reviewed in the United States on February 3, 2026 by Mattzzz
Color: White
Item Thickness: 4 Inches
Size: Full
This mattress is comfortable and well made. It fit our pull out couch well!
Reviewed in the United States on February 6, 2026 by Nicole
Color: Grayish Black
Item Thickness: 12 Inches
Size: Twin
A little soft for me and I wish I had gotten a thicker one. Aside from my choices, it’s a nice mattress and a great price. Inflated for 72 hrs and is just as described. It’s very pretty and comfortable. Delivered quickly.
Reviewed in the United States on February 25, 2026 by pat glew
Color: White
Item Thickness: 4 Inches
Size: Queen
This arrived on time and has grown in depth as expected in just 24 hours. While I haven't slept on it, I can tell its going to give a good night's sleep just by the comfort and firmness from lying on it. It fits my queen sized hide-a-bed great.
Reviewed in the United States on February 6, 2026 by alcog
second wellynap matress I've bought. Firm, comfortable, great buy. Even came two days earlier than expected. My dogs love it too!
Reviewed in the United States on January 20, 2026 by saa
Color: White & Blue
Item Thickness: 4 Inches
Size: Full
Very comfortable mattress for a sofa bed. Folded up easily into the sofa and still nice each time we pull it back out. No trouble with it plumping up upon taking it out of packaging.
Reviewed in the United States on January 1, 2026 by shannon vargo
Color: White & Blue
Item Thickness: 4 Inches
Size: Full
Hello, yes this mattress fit perfectly and is very comfortable. I was very surprised how fast it took shape after unboxing. It was perfect in all four corners. For a RV fold out bed, it seems very durable. Mattress is very firm.
Reviewed in the United States on December 14, 2025 by Amazon Customer
Color: White
Item Thickness: 4 Inches
Size: Full
This is ideal in size and very comfortable!
Reviewed in the United States on January 30, 2026 by Grandma Nette