Mainstays 1.5" Memory Foam Mattress Topper, King
Mainstays 1.5" Memory Foam Mattress Topper, King
Hero image 0 of Mainstays 1.5" Memory Foam Mattress Topper, King, 0 of 7
Mainstays

Mainstays 1.5" Memory Foam Mattress Topper, King

4 stars out of 570 reviews
(4.0)|
570 ratings
Mainstays 1.5" Memory Foam Mattress Topper, KingMainstays 1 5 Memory Foam Mattress Topper KingMainstays 1 5 Memory Foam Mattress Topper QueenMainstays 1 5 Memory Foam Mattress Topper FullMainstays 1 5 Memory Foam Mattress Topper Twin Twin XL
Size:King-Out of stock

About this item

  • Pressure-Relieving Comfort: Ergonomic, contour-cut memory foam surface provides targeted relief and is treated with an antimicrobial finish for a clean, fresh sleep environment.
  • Customizable Support: Choose your comfort—use the flat side for a firmer feel or the contoured wave side for a massaging effect and enhanced body contouring.
  • All-Season Breathability: Contoured design promotes airflow and reduces heat buildup, offering pressure-point relief for the head, shoulders, and hips—ideal for all sleep styles.
  • Certified Sustainable Quality: Made with bio-based memory foam certified by the USDA’s Biopreferred program and backed by CertiPUR-US® and OEKO-TEX® Standard 100 certifications for safety, durability, and performance.

At a glance

Brand
Mainstays
Material
Memory Foam
Bed size
King
Features
Antimicrobial, Hypoallergenic
Thickness
1.5 in
Firmness
Firm
Current price is $44.98
Price when purchased online
Out of stock

How do you want your item?

How do you want your item?
Out of stock

About this item

Product details

Specifications

Warranty

Customer ratings & reviews

4 out of 5 stars
stars570 ratings366 reviews
How item rating is calculated

Reviews summary

Generated by AI

Soft and comfortable mattress topper with some quality issues

Customers generally find the product to be a good value for the price, praising its exceptional softness, comfort, and affordability. However, some express concerns about the strong, unpleasant chemical smell, which often dissipates over time, and the poor quality materials that lead to frequent tearing. Additionally, there are mixed opinions on the product's size, with some finding it fits their mattress perfectly, while others report it being smaller than expected. Despite these issues, most customers appreciate the product's comfort, citing adequate cushion and support, pain relief, and improved sleep quality.

Customer images

  • +124 images
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |
Showing 1-3 of 366 reviews
Nov 23, 2022
Kedst123
5 out of 5 stars review

Easy to put on- Feels GREAT!

Our Mainstays memory foam mattress topper is the best! It's 1.5 inches, but I think it seems bigger than that. The topper is not super heavy so even with a king sized bed, it wasn't hard to put on. It fits perfectly, no overlap or short sides. I had a mattress topper once that had an odor- but not this one! It didn't have any odor that I noticed. It does make the bed feel cooler, and we sleep so well! It came nicely boxed, and poofs out once you lay it on the bed. I like the 3 year warranty too, although I can't imagine having to need it. My ankles bother me on regular beds, but this memory topper really helps my ankles, and my whole body feel better in bed. I think you'll enjoy it- and it would make a nice gift as well.

Incentivized Review
Helpful?
reply from CustomerCareSpecialist

Thank you for your review! We are very happy to hear that you are enjoying your purchase of the Mainstays 1.5-inch Memory Foam Mattress Topper and pleased that you choose us to accommodate your sleeping needs! Your feedback is very important to us and appreciated. If you ever have any questions for us, please call contact us at customerservice@sinomax-usa.com

Nov 8, 2022
MicinSC
5 out of 5 stars review

New and DIFFERENT

I have purchased so many of these in the past that were really uncomfortable due to the old style egg crate shape that actually adds pressure points! Besides that design flaw, they were awful to smell for weeks on end! THIS IS NEW AND DIFFERENT! I got this in the queen and when it arrived I was happy to see the plastic was open ended so it had breathability for venting smell...but wait! NO SMELL! I got to use it straight away. PLEASANTLY surprised! Also the wave pattern was perfect for comfort with no pressure points. EXTREMELY happy with Mainstays newest toppers, they are greatly improved! This is SO SO soft!

Incentivized Review
Helpful?
reply from CustomerCareSpecialist

Thank you for your review! We are very happy to hear that you are enjoying your purchase of the Mainstays 1.5-inch Memory Foam Mattress Topper and pleased that you choose us to accommodate your sleeping needs! Your feedback is very important to us and appreciated. If you ever have any questions for us, please call contact us at customerservice@sinomax-usa.com

Nov 15, 2022
Mamahen3
5 out of 5 stars review

Amazing topper!!

I was very skeptical of this mattress topper but it exceeded my expectations. I originally wanted a pillow top cover but they were so pricey. I put this on and and thought, wow this definitely doesn't cover my king size mattress, but as the instructions say, I waited a couple hours and walked in and it has expanded and covered and got thicker. I laid down on it and didn't think it was much difference. I put my sheets on and climbed into bed and began to feel the greatness. I was shocked. This actually feels so good to sleep on! My husband even loved it. My only complaint would be the blue color. I would prefer white so I don't see it through my thin sheets but I definitely recommend this topper. Amazing what difference just a couple inches make.

Incentivized Review
Helpful?
reply from CustomerCareSpecialist

Thank you for your review! We are very happy to hear that you are enjoying your purchase of the Mainstays 1.5-inch Memory Foam Mattress Topper and pleased that you choose us to accommodate your sleeping needs! Your feedback is very important to us and appreciated. If you ever have any questions for us, please call contact us at customerservice@sinomax-usa.com