Subrtex 4 Inch King Mattress Topper, Gel Memory Foam Bed Topper with Removable Cover, Pressure Relieving for Old Mattress Upgrade, CertiPUR-US Certified
Subrtex 4 Inch King Mattress Topper, Gel Memory Foam Bed Topper with Removable Cover, Pressure Relieving for Old Mattress Upgrade, CertiPUR-US Certified
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Subrtex

Subrtex 4 Inch King Mattress Topper, Gel Memory Foam Bed Topper with Removable Cover, Pressure Relieving for Old Mattress Upgrade, CertiPUR-US Certified

4,052 ratings
Subrtex 4 Inch King Mattress Topper, Gel Memory Foam Bed Topper with Removable Cover, Pressure Relieving for Old Mattress Upgrade, CertiPUR-US CertifiedSubrtex 4 Inch King Mattress Topper Gel Memory Foam Bed Topper Removable Cover Pressure Relieving Old Mattress Upgrade CertiPUR US Certified2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 2 inch Full2 Mattress Topper Gel Infused Memory Foam Mattress Topper Soft Breathable Cover CertiPUR US Certified Adjustable Straps Machine Washable 2 Twin2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 4 inch Queen2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 4 inch Twin2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 2 inch California King2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 3 inch King2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 3 inch Twin2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 2 inch King2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 2 inch Twin2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 2 inch Twin XL4 Mattress Topper Gel Infused Memory Foam Mattress Topper Soft Breathable Cover CertiPUR US Certified Adjustable Straps Machine Washable 4 Queen2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 4 inch California KingSubrtex 3 inches Gel Infused Memory Foam Bed Mattress Topper High Density Cooling Pad Removable Fitted Bamboo Cover Ventilated Design 10 Years Warran3 Mattress Topper Gel Infused Memory Foam Mattress Topper Soft Breathable Cover CertiPUR US Certified Adjustable Straps Machine Washable 3 Twin3 Mattress Topper Gel Infused Memory Foam Mattress Topper Soft Breathable Cover CertiPUR US Certified Adjustable Straps Machine Washable 3 FullSubrtex 3 Inch Twin XL Mattress Topper Gel Memory Foam Bed Topper Removable Cover Pressure Relieving Old Mattress Upgrade CertiPUR US Certified2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 4 inch Full2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 2 inch Queen3 Mattress Topper Gel Infused Memory Foam Mattress Topper Soft Breathable Cover CertiPUR US Certified Adjustable Straps Machine Washable 3 California2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 3 inch QueenSubrtex 3 Inch Cal King Mattress Topper Gel Memory Foam Bed Topper Removable Cover Pressure Relieving Old Mattress Upgrade CertiPUR US Certified2 3 or 4 Inch Gel Infused Memory Foam Mattress Topper with Removable Fitted Cover 4 inch Twin XL4 Mattress Topper Gel Infused Memory Foam Mattress Topper Soft Breathable Cover CertiPUR US Certified Adjustable Straps Machine Washable 4 Twin
Bed SizeKing
Thickness4 in

Key item features

  • Comfort Upgrade: Refreshes firm or aging mattresses, adding a 4-inch responsive memory foam layer for balanced comfort and support without replacing the entire bed.
  • Pressure Relief: High-density memory foam conforms to body curves, evenly distributing weight and cushioning pressure points on shoulders, hips, and back for enhanced comfort.
  • Cooling Ventilation: Gel-infused memory foam features a ventilated structure promoting airflow, adapting for consistent comfort across the sleep surface.
  • Washable Cover: Removable cover, made from a breathable bamboo rayon blend (90% polyester, 10% rayon), is machine washable for easy everyday care.
  • Secure Straps: Adjustable straps help secure the topper to your existing mattress, reducing shifting for a stable sleeping experience.
  • Certified Foam: CertiPUR-US certified memory foam ensures the topper meets established standards for content, emissions, and product durability.
  • Simple Unpacking: Arrives compressed and rolled for easy delivery, requiring 24–48 hours to fully expand to its intended king size.
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About this item

Product details

Specifications

Warranty

Customer ratings & reviews

4.3 out of 5 stars
stars
4,052 ratings1,464 reviews
How item rating is calculated
  1. 5 stars70% (2,853)
  2. 4 stars11% (439)
  3. 3 stars5% (202)
  4. 2 stars4% (155)
  5. 1 star10% (403)

Reviews summary

Pros

  • : Offers balanced firmness and softness for a comfortable surface.
  • : Provides relief from multiple areas of the body.
  • : The topper shows consistent durability and sturdy build.
  • : Priced lower than similar products.

Neutral

  • : It varies from soft to overly firm and causes inconsistent support
  • : Can be secure, but may not stay in place for all users.
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Showing 1-3 of 1,464 reviews

Jul 4, 2026
Reviewer name: anonymous
Item details
Bed size: King
Thickness: 4 in
Sold bySUBRTEXDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Very comfortable helps with my chronic back pain.

Helpful?39CV8W66BJYS393808163
Sep 23, 2026
Reviewer name: jamie
Item details
Bed size: Queen
Thickness: 4 in
Sold bySUBRTEXDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Good nites rest finally

I just put it on the brand new bed with springs that's been killing my back shoulders etc I'm hoping this will do the job. When I laid on it I almost fell asleep rite their it feels awesome and it's all of 4 inches it has some sturdy straps to hold in place too. So far I'm very happy.

Helpful?39CV8W66BJYS393808163
Aug 28, 2026
Reviewer name: carolann
Top Reviewer
Item details
Bed size: King
Thickness: 4 in
Sold bySUBRTEXDelivered byWalmart
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

In love 🩷!!

This mattress pad is very comfortable and well designed. It expanded to full thickness in about two hours and I love the comfort of the product

Helpful?39CV8W66BJYS393808163
Current price is $157.39
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4.5 stars out of 5, based on 5854 seller reviews(4.5)
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