Mainstays 2" Memory Foam Mattress Topper, Twin XL
Mainstays 2" Memory Foam Mattress Topper, Twin XL
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Mainstays 2" Memory Foam Mattress Topper, Twin XL

8,069 ratings

Key item features

  • Precise Dimensions: This Twin XL mattress topper precisely measures 38 inches wide, 79 inches long, and 2 inches thick, engineered for a clear and accurate fit on your existing Twin XL bed.
  • Adaptive Support: Crafted from 2 inches of gel-infused memory foam, it is designed to contour to your body and effectively relieve pressure points, enhancing comfort.
  • Balanced Firmness: Offering a medium firmness level, the topper provides a balanced and comfortable feel, refreshing your current sleep setup with ease.
  • Cooling Design: Features a breathable, cooling-oriented design, specifically promoting optimal airflow for a more comfortable sleep environment.
  • Easy Maintenance: For convenient care, the topper requires simple spot cleaning using only a mild detergent, ensuring sustained freshness.
  • Hassle-free Setup: The product ships efficiently compressed and rolled, facilitating an easy and straightforward setup process upon arrival.
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Specs

Bed size, Twin-XLFirmness, MediumThickness, 2 inFill material, Memory FoamMaterial, Memory FoamBrand, Mainstays

About this item

Product details

Add a fresh layer of comfort to your Twin XL bed with the Mainstays 2" Memory Foam Mattress Topper. This 2-inch memory-foam layer sits on top of your existing mattress to give your sleep setup an easy refresh. It features gel-infused memory foam that's designed to contour to your body and help relieve pressure points for added comfort. With a medium feel and a breathable, cooling-oriented design, it's a straightforward way to adjust how your bed feels. The topper ships conveniently compressed and rolled for easy setup.
  • Twin XL size measuring 38 in x 79 in x 2 in for a clear bed-fit match
  • Made with 2 inches of gel-infused memory foam designed to contour to your body and help relieve pressure points
  • Medium firmness for a balanced feel
  • Breathable, cooling-oriented design
  • Spot clean with mild detergent
  • Ships compressed and rolled for easy setup
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.  

Specifications

Bed size

Twin-XL

Firmness

Medium

Thickness

2 in

Fill material

Memory Foam

Customer ratings & reviews

4.4 out of 5 stars
stars
8,069 ratings2,183 reviews
Includes global ratings and reviews
How item rating is calculated

Reviews summary

Pros

  • : Provides a comfortable sleeping experience with a plush feel.
  • : Provides cushioning to alleviate back pain.
  • : Priced lower than similar products.
  • : Made of thick material that contours to the body.
  • : Fits standard mattress sizes with minor edge issues.

Neutral

  • : Can expand quickly, but may not reach full size.
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Showing 1-3 of 2,183 reviews

Sep 10, 2026
Reviewer name: OyuntungalagO
5 out of 5 stars
5 out of 5 stars review

Very Comfortable and Thick!

[This review was collected as part of a promotion.] I'm really happy with this 4-inch memory foam mattress topper. It arrived compressed, but after opening it and letting it expand, it reached a nice thickness and looked even all around. The foam feels soft and supportive and adds a lot of cushioning to the mattress. I especially like how thick it is—it makes a firm mattress feel much more comfortable and gives the bed a plush, cozy feel. The quality looks good for the price, and mine expanded nicely without any major uneven areas. Overall, I'm very satisfied with it so far and would definitely recommend.

Review from sinomax-usa.com
Helpful?7JB0A36A46F55394811326
Jul 21, 2026
Reviewer name: NancyA
5 out of 5 stars
5 out of 5 stars review

Great topper that provides a lot of support

[This review was collected as part of a promotion.] I am really enjoying this mattress topper! I did allow it a full day to air out and fully come to life. There is a smell, but there are instructions that state you can spray a fabric spray which I did and it helped. The four inch foam makes a huge difference. It is like sleeping on a cloud. I was able to still move around, but it conformed to my body. I slept so much better after night one. I had no issues with my sheets fitting.

Review from sinomax-usa.com
Helpful?7JB0A36A46F55394811326
Oct 12, 2026
Reviewer name: Lillie
Walmart Associate
Item details
Bed size: Twin
Thickness: 3 in
Multipack quantity: 1
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Performed just as promised, great buy!

For the price paid for this mattress, I expected to give a bit of relief but I didn't expect it to transform this bed as it has. The difference it has made in my sleep comfort is priceless. It fits perfectly, it's thick enough to make a true difference,vit has no odor, and it fluffed out fully within an hour or so. I have only a minor issue and that is that after a few days, I have to place it back in the proper position as it as moved over from its desired placement. I haven't felt it move at all, but , it does slide a tiny bit over time. For the price I paid, I can deal. I have seen a few reviews saying it makes you hot or sweat, I have not found that to be an issue whatsoever. All in all, IMO, I think this memory foam mattress topper to be a great purchase that is true to the claims made. it gives a better, more comfortable rest than I had without it. I recommend this product, as I feel it was a great purchase because quality and performance wise, it does the job it says it does. Happily recommend.

Helpful?7JB0A36A46F55394811326
Price when purchased online
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