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Wellynap

4 Inch Gel Memory Foam Sofa Mattress Full Size, CertiPUR-US Certified, with Removable Washable Cover, for Guest Rooms, Sofas, RVs & Boats

  • Based on 72 reviews
Condition: New
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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: In Stock.
Fulfilled by Wellynap-Direct
Arrives Jul 26 – Jul 28
Order within 3 hours and 46 minutes
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Color: White


Item Thickness: 4 Inches


Size: Full


Features

  • 4-Inch Sofa Mattress: Provides maximum comfort and support, ensuring a perfect sleep climate for you and your guests. MATTRESS ONLY: Frame, couch, headboard, and other items shown are NOT included
  • Premium Quality & Certifications: CertiPUR-US and OEKO-TEX certified, guaranteeing safety, durability, and environmental responsibility. 4-Layer Construction: Features a 0.5-inch gel memory foam top layer, 3.5-inch high resilience foam base, soft knit fabric cover, and anti-slip bottom fabric for stability and longevity
  • Easy Storage Design: Folds neatly into your sofa bed frame for a tidy finish, making it ideal for space-saving in guest rooms, living rooms, RVs, and boats
  • Machine Washable Cover: Removable zipper cover allows for hassle-free cleaning and maintenance, ensuring your mattress stays fresh and hygienic. The mattress is vacuum-packed and rolled in a box for easy delivery. Please allow 48 - 72 hours for it to fully expand after unboxing.
  • Versatile Use: Perfect for full size sofa beds, spare rooms, living spaces, recreational vehicles, and marine environments. Full size dimensions: 72"L x 53"W x 4"H

Brand: Wellynap


Size: Full


Product Dimensions: 72"L x 53"W x 4"Th


Item Weight: 16.53 Pounds


Item Firmness Description: Medium Firm


Top Style: Tight Top


Cover Material: Polyester Blend


Number of Layers: 4.0


Fill Material: Gel Memory Foam, High Density Foam


Special Feature: Breathable, Durable, Pressure Relief, Removable Cover, Washable


Item Firmness Description: Medium Firm


Number of Layers: 4.0


Additional Features: Breathable, Durable, Pressure Relief, Removable Cover, Washable


Construction Type: Memory Foam


Is Customizable?: No


Is Foldable: Yes


Size: Full


Item Dimensions L x W x Thickness: 72"L x 53"W x 4"Th


Item Weight: 16.53 Pounds


Item Thickness: 4 Inches


Item Dimensions: 72 x 53 x 4 inches


Item Depth: 4 inches


Cover Material: Polyester Blend


Fill Material: Gel Memory Foam, High Density Foam


Mattress Comfort Layer Material: Gel Memory Foam


Material Type: Memory Foam


Brand Name: Wellynap


Model Name: U2A


Model Number: U2A


UPC: 756395853997


Manufacturer: Wellynap


Set Name: Full


Manufacturer Part Number: U2A


Is Extendable: No


Unit Count: 1.0 Count


Included Components: Memory Foam, Removable Cover


Item Type Name: Bed Mattress Conventional


top-style: Tight Top


Color: White


Style Name: Modern


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jul 26 – Jul 28

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Overall good quality!
Color: White Item Thickness: 4 Inches Size: Queen
My husband and I slept on this while we had family staying with us, and are impressed with the comfort level for a 3-4” foam! You don’t sink into it like I expected. It holds you firmly. And folds up well into the pull-out couch. It didn’t get quite to 4”.. maybe about 3-3.5” in some areas, and we let it expand for 48 hrs then had to use it for our guests. ... show more
Reviewed in the United States on May 10, 2026 by Heidi
    • Perfect for my situation
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. ... show more
Reviewed in the United States on February 3, 2026 by Mattzzz
    • Perfect fit, is springy memory foam
Color: White Item Thickness: 4 Inches Size: Full
4.5 stars. A big brand name this is not, but has a good feel when laying on it. The size is perfect for the bed. Fits in like a dream. It is springy to the touch and returns to its original shape in a few seconds. It folds up wonderfully in my sofa bed too, as expected and hoped for. For 4" thick, it's not going to be too firm, but it does have a reasonably solid feel. I added a second, foldable 4" on top for more comfort. Expansion upon opening took about 12 hours, but I let it breathe for 24 before adding a mattress protector. Longevity is probably going to be 7 to 10 years. Industry standard. ... show more
Reviewed in the United States on September 18, 2025 by Twiddles42
    • would purchase again
Color: White & Blue Item Thickness: 4 Inches Size: Full
perfect for the price. Fit great and feels comfortable.
Reviewed in the United States on May 2, 2026 by Jennie Quezada
    • Comfort and quality
Excellent quality and comfort for the price!
Reviewed in the United States on May 3, 2026 by Sarah M Bridges
    • Easy to set up
Works great. Comfy and easy to install.
Reviewed in the United States on June 1, 2026 by Amy Charrier
    • Great quality
Color: White & Blue Item Thickness: 4 Inches Size: Full
Great quality and affordable.
Reviewed in the United States on May 7, 2026 by Mary Jane
    • comfortable and perfect fit for hide-a-bed
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

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