Mainstays 1.5 in 7-Zone Reversible Memory Foam Mattress Topper, King
Mainstays 1.5 in 7-Zone Reversible Memory Foam Mattress Topper, King
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Mainstays

Mainstays 1.5 in 7-Zone Reversible Memory Foam Mattress Topper, King

4,642 ratings
Mainstays 1.5 in 7-Zone Reversible Memory Foam Mattress Topper, KingMainstays 1 5 7 Zone Reversible Memory Foam Mattress Topper KingMainstays 1 5 7 Zone Reversible Memory Foam Mattress Topper QueenMainstays 1 5 7 Zone Reversible Memory Foam Mattress Topper Twin Twin XLMainstays 1 5 7 Zone Reversible Memory Foam Mattress Topper Full
Bed SizeKing

Key item features

  • Generous Dimensions: This King-sized mattress topper measures approximately 79 inches long, 75 inches wide, and 1.5 inches high, designed to fit standard king mattresses.
  • Dual Comfort: Features a reversible 7-zone design, providing two comfort options: a zoned massaging feel on one side and firmer, targeted support on the other.
  • Targeted Support: The innovative seven comfort zones are engineered to cushion key body areas, including shoulders, hips, and lower back, enhancing overall sleep comfort.
  • Memory Foam Benefits: Constructed with a 1.5-inch memory foam layer that adapts to the body, helping relieve pressure points and minimizing motion transfer for undisturbed sleep.
  • Effortless Integration: Its slim 1.5-inch profile allows the topper to easily fit underneath standard fitted sheets, providing a simple update to your existing mattress.
  • Simple Maintenance: For care, the mattress topper requires spot cleaning only.
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Specs

Thickness, 1.5 inBed size, KingFirmness, MediumMaterial, Memory FoamFill material, Memory FoamCare and maint, Spot Clean Only

About this item

Product details

Refresh your bed with this Mainstays King mattress topper. Its 1.5 in memory foam layer adds cushioning without replacing your mattress. The reversible 7-zone design gives you two comfort options in one topper. One side offers a zoned massaging feel, while the other provides firmer targeted support. The foam adapts to your body to help relieve pressure points, and it helps minimize motion transfer so the bed feels less disturbed by movement. This topper is made for adult use and is a simple way to update the feel of your sleep space.
  • King size topper measures approx. 79 in L x 75 in W x 1.5 in H and is designed to fit standard king mattresses.
  • Reversible construction features seven comfort zones to cushion key areas such as the shoulders, hips, and lower back.
  • The 1.5 in profile fits easily under standard fitted sheets for a straightforward mattress update.
  • Spot clean only for care and maintenance.
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

Thickness

1.5 in

Bed size

King

Firmness

Medium

Material

Memory Foam

Warranty

Warranty information

3 Year Manufacturer's Warranty

Customer ratings & reviews

4.3 out of 5 stars
stars
4,642 ratings1,190 reviews
How item rating is calculated
  1. 5 stars69% (3,192)
  2. 4 stars12% (560)
  3. 3 stars7% (322)
  4. 2 stars4% (163)
  5. 1 star9% (405)

Reviews summary

Pros

  • : Reduces back, hip, and joint pain during sleep.
  • : Provides noticeable pressure relief.
  • : Offers good value considering features and quality.
  • : Fits perfectly under fitted sheets with no overlap.
  • : Made of decent and comfortable materials.

Neutral

  • : The topper offers modest padding yet can compress nearly flat.
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Showing 1-3 of 1,190 reviews

Oct 13, 2026
Reviewer name: Candis
Top Reviewer
Item details
Bed size: Twin-XL
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Really enjoying using these

I have bought three of these now, two twins and one queen. The twin has saved us a bunch of money. Husband wanted a new mattress b/c of his back, but I love our bed. I put the twin size memory foam on his side of our king size bed, along with a twin mattress topper, and he is happy with our bed now and we saved the cost of buying a new mattress! They are just as photographed, egg carton-type surface on one side and flat on the other, and take 10 or 15 min I think to be fully expanded from being rolled up.

Helpful?4MBQAHYGQC3Q1109398121
Jul 8, 2026
Reviewer name: C
Top Reviewer
Item details
Bed size: Twin-XL
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Fits perfectly; exactly as described

I bought this to cut up for dog bed padding. It is exactly what I wanted and is exactly as described. It has no odor and fits a twin mattress both in width and length, although that's not how I plan to use it. It has zero odor and is completely rectangular in width and length, and is a uniform 1 1/2 inches in height as described. It was packaged perfectly and sealed. I don't understand why this product has spotty reviews. It 100% meets the description and specifications. If I was personally planning to sleep in it I would probably choose a thicker product, but for the price and my intended use, it's exactly what I wanted.

Helpful?4MBQAHYGQC3Q1109398121
Sep 26, 2026
Reviewer name: Walmart customer
Top Reviewer
Item details
Bed size: Queen
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Depth not quite accurate

It's fine. Measurement of depth is from the top of egg bump just in case you think it's the actual foam part. Makes it a little deceiving about the thickness, but it's still decent for the price. Next time though I'd get the one with no eggcrate pattern (the flat type).

Helpful?4MBQAHYGQC3Q1109398121
Current price is $44.98
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