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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 149 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Wellynap-Direct

Arrives Thursday, Jul 16
Order within 5 hours and 38 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. Visit the Store Visit the Store

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: 4.0


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: 4.0


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


Construction Type: Memory Foam


Is Customizable?: No


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 Dimensions: 72 x 53 x 4 inches


Item Depth: 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


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


Mattress Type: Standard Mattress


Manufacturer: Wellynap


Manufacturer Part Number: MemoryFoam-U


Is Extendable: No


Unit Count: 1.0 Count


Included Components: Memory Foam, Removable Cover


top-style: Tight Top


Color: White


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jul 16

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

Learn more about financing & leasing here.

Top Amazon Reviews


  • 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

  • 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

  • Perfect bed
So comfortable, I just sink into it when I lay down
Reviewed in the United States on June 1, 2026 by SC

  • Comfy
We needed a new mattress for the pullout couch we purchased online. This queen sized mattress fits perfect inside the couch. It's very comfy! My niece liked it a lot better than the other one we had. It's firm but form fitting. It is easy to fold however gets a little stuck when trying to push it back in. ... show more
Reviewed in the United States on February 19, 2026 by Brittany

  • Mattress
Color: Simple Grey Item Thickness: 4 Inches Size: Full
Very comfortable
Reviewed in the United States on May 17, 2026 by Danette Firchau

  • Good for lower back pain
Color: Black Item Thickness: 8 Inches Size: King
Good replacement mattress semi firm
Reviewed in the United States on May 5, 2026 by HUBERT D FULLER

  • Great mattress
Color: Black Item Thickness: 8 Inches Size: King
Great quality for the price. Standard king size, very comfortable. Firmness is perfect.
Reviewed in the United States on February 27, 2026 by Jordan Roberts

  • Check the size! Does not fit sofa sleeper.
Color: White Item Thickness: 4 Inches Size: Full
Does not fit full size sofa sleeper. I bought the 4" full size. This does seem like a good quality mattress, unfortunately it is too long for my full size sofa sleeper couch. The couch won't fold up with the mattress on it. I dont know how i can return it considering it came compressed, amd there is no way I could get it back in the packaging. If you a re buying for a sofa sleeper, measure your frame first. ... show more
Reviewed in the United States on June 25, 2026 by Sarah

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