Dyfun 4" King Gel Memory Foam Mattress Topper with Cooling Cover, CertiPUR-US Certified, Non-Slip
Dyfun 4" King Gel Memory Foam Mattress Topper with Cooling Cover, CertiPUR-US Certified, Non-Slip
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DyFun

Dyfun 4" King Gel Memory Foam Mattress Topper with Cooling Cover, CertiPUR-US Certified, Non-Slip

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Bed Size:King
Thickness:4 in
Pattern:Plush

Key item features

  • Cooling Comfort: Infused with cooling gel, this 4-inch king mattress topper adapts to your body, relieving pressure points and maintaining a cool, comfortable sleep surface, ideal for hot sleepers.
  • Certified Materials: Made with CertiPUR-US and OEKO-TEX certified foam, ensuring it is free from harmful chemicals and safe for adults and teens.
  • Secure Design: An upgraded non-slip design keeps the topper securely in place all night, ensuring consistent comfort without shifting or bunching.
  • Easy Maintenance: Features a removable and machine-washable cover, making cleaning hassle-free and keeping your topper fresh.
  • Versatile Options: Available in 2, 3, and 4-inch thicknesses and various sizes including Twin, Queen, King, and Cal King to fit almost any mattress.
  • Convenient Setup: Delivered compressed in a compact roll for hassle-free setup; simply unbox, unroll, and allow it to expand.
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Current price is Now $99.00
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was $119.99
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About this item

Product details

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Customer ratings & reviews

4.2 out of 5 stars
stars415 ratings108 reviews
How item rating is calculated
  1. 5 stars65% (268)
  2. 4 stars15% (63)
  3. 3 stars8% (33)
  4. 2 stars3% (13)
  5. 1 star9% (38)

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Showing 1-3 of 108 reviews

Feb 21, 2026
Walmart customer
Item details
Bed size: Full
Thickness: 4 in
Pattern: Plush
5 out of 5 stars review

Verified Purchase

The Best Buy Ever!

i would buy another one if i need it. its BEST topper i have ever bought an ive bought many . its so soft an i have really bad back an hip troubles an this took pain away in the morning i wasnt hurting as bad . if you are looking for a soft cloud to sleep on buy this .

Helpful?5TJDZ7HEEX4915366301360
Jun 20, 2025
Stormy
Item details
Bed size: King
Thickness: 4 in
5 out of 5 stars review

Verified Purchase

Good purchase

I purchased this 4” mattress topper to go on top of a very uncomfortable, old, hard mattress. It has made a world of difference. I no longer wake up feeling aches and pains. The mattress topper comes conveniently already inside the cover, and expands as promised within the cover. The topper and the cover seem to be of a good quality. I would recommend this product as a good purchase.

Incentivized Review
Helpful?5TJDZ7HEEX4915366301360
Jan 3, 2026
Nancy
Item details
Bed size: Full
Thickness: 4 in
5 out of 5 stars review

Verified Purchase

Family came for Christmas and my adult grandson with back problems slept on it. The topper made my futon, which also came from Walmart 8 or 10 years ago, very comfortable. Easy to put on and he said it was great to sleep on. Also reasonably priced.

Helpful?5TJDZ7HEEX4915366301360