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4 Inch Sofa Mattress Full Size, Gel Memory Foam Infused, with Removable Washable Cover, for Sleeper Sofas, Pull Out Bed, Guest Room, RVs, Boats

  • Based on 116 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Wellynap-Direct

Arrives Sunday, Sep 6
Order within 9 hours and 6 minutes
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Color: White


Item Thickness: 4 Inches


Size: Full


Features

  • Supportive Comfort: A 0.5-inch gel-infused memory foam top layer provides a body-contouring hug that helps prevent overheating, while the 3.5-inch high-resiliency foam base offers firm support to prevent sagging. (Please NOTE this is a mattress only; bed frame and other items are not included)
  • Certified Durability & Lasting Support: Crafted from high-density memory foam and certified by both OEKO-TEX and CertiPUR-US, this mattress is independently verified for safety and exceptional resilience. It's engineered to maintain its shape and supportive comfort for years, significantly extending its lifespan
  • Convenient & Space-Saving: Designed for easy living, this Full size mattress folds compactly to fit neatly into most sofa bed frames. It's a perfect space-saving solution for apartments, guest rooms, living areas, RVs, and boats
  • Effortless Cleaning & Secure Fit: The removable, zippered cover is machine washable for simple maintenance. A built-in anti-slip bottom fabric helps keep the mattress securely in place on your sofa bed frame, providing stability night after night
  • Versatile Full Size Dimensions: Perfectly sized at 72" L x 53" W x 4" Th, this mattress is ideal for Full size sleeper sofas, spare rooms, campers, and dorms. It provides a comfortable, supportive sleeping surface wherever you need it

Description

Can this mattress be used on a sofa bed? Yes, this mattress is designed for versatile use, including on sofa beds. It is foldable and fits standard sofa bed frames, making it ideal for space-saving in guest rooms, living rooms, RVs, and boats. Is it good for side sleepers? This mattress is generally considered comfortable and supportive for side sleepers. The 4-inch gel memory foam provides pressure relief, which is beneficial for side sleepers who need cushioning for their shoulders and hips. Is it easy to fold? Yes, this mattress is designed for easy storage and can be folded neatly into a sofa bed frame. Is it easy to clean? Yes, the mattress is designed for easy cleaning and maintenance. It comes with a removable and washable cover, which allows for hassle-free cleaning. How long does it take for the mattress to fully expand after unboxing? It typically takes 24-48 hours for the mattress to fully expand after unboxing. We believe that a better night's sleep leads to a better life. Good things happen along with it.

Brand: Wellynap


Size: Full


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


Item Weight: 16.5 pounds


Item Firmness Description: Medium Firm


Top Style: Tight Top


Number of Layers: 4


Fill Material: Gel Memory Foam, High Density Foam


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


Color: White


Item Firmness Description: Medium Firm


Number of Layers: 4


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


Construction Type: Memory Foam


Size: Full


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


Item Weight: 16.5 pounds


Item Thickness: 4 inches


Item Depth: 4 inches


Item Dimensions: 72 x 53 x 4 inches


Fill Material: Gel Memory Foam, High Density Foam


Product Care Instructions: Machine Wash


Mattress Comfort Layer Material: Gel Memory Foam


Material Type: Memory Foam


top-style: Tight Top


Color: White


Brand Name: Wellynap


Model Name: MemoryFoam-U


Product Benefits: Back Pain Relief, Improves Sleep, Pressure Relief, Reduces Toss & Turn, Stress Relief


Model Number: MemoryFoam-U


Number of Items: 1


Mattress Type: Standard Mattress


Number of Packs: 1


Manufacturer: Wellynap


Unit Count: 1 Count


Included Components: Memory Foam, Removable Cover


Manufacturer Part Number: MemoryFoam-U


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Sep 6

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.

  • Klarna Financing
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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Comfortable and Great for Guests
Color: White Item Thickness: 4 Inches Size: Queen
This mattress is very comfortable and a great option for a sofa bed or guest space. The 4-inch thickness provides a nice balance of comfort and support without being too bulky. It was easy to set up and expanded nicely. I’m very happy with the quality and comfort for the price.
Reviewed in the United States on August 18, 2026 by Robert Boxley

  • Fabulous mattress
Color: White Item Thickness: 4 Inches Size: Queen
Fit perfectly on my queen size sleeper sofa. Wayyy more comfortable than the original mattress! Love this!
Reviewed in the United States on July 8, 2026 by debi bender

  • Great mattress!
Color: White Item Thickness: 4 Inches Size: Full
Bought to replace old mattress on pull out sofa. This so comfortable. So much better than the mattress that came with the sofa!
Reviewed in the United States on July 25, 2026 by k harlow

  • Great
Fit great! Couch closed up nice. Perfect for overnight guest.
Reviewed in the United States on July 10, 2026 by DAWN

  • Comfortable
Color: White Item Thickness: 4 Inches Size: Queen
Fit our queen-sized sofa bed well. Seems to be comfortable.
Reviewed in the United States on July 5, 2026 by Richard Flora

  • Comfort
Color: White Item Thickness: 4 Inches Size: Full
Fits hide-a-way full couch bed fine. Comfy to lay on. Only draw back, nothing to tie it onto the springs, hence it slides off.
Reviewed in the United States on July 12, 2026 by DOUG DELONG

  • Great Sofa Sleeper!!!
Worked great for our camper sofa sleeper. Got many nights of rest on it.
Reviewed in the United States on August 8, 2026 by Darrel Broten

  • Quite impressed
Color: White Item Thickness: 4 Inches Size: Full
Bought this for an rv camper sleeper sofa. Impressed with the quality of product and though we haven't slept on it yet it really improved the comfort of the couch. Clean, no smell and puffed up as advertised. Price was extremely reasonable also!
Reviewed in the United States on June 5, 2026 by rlmama

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