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Mainstays

Mainstays 6” Medium Firm Memory Foam Mattress, Twin

4.3 stars out of 4694 reviews
(4.3)|
4,694 ratings
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Bed Size:Twin
Mattress Thickness:6 in

Key item features

  • Versatile Design: 6" profile fits guest rooms, teen rooms, dorms, trundle beds, and bunk beds.
  • Universal Comfort: Medium firmness suitable for side, back, and stomach sleepers.
  • Enhanced Breathability: Soft, durable cover improves airflow and comfort.
  • Specialty Infusions: Green Tea Infused Memory Foam and Liquid Gel Flex Foam keep you cool and comfortable.
  • Motion Isolation: Minimizes movement transfer for undisturbed sleep.
  • Wide Compatibility: Works with platform beds, slatted frames, adjustable bases, or traditional box springs.
  • Safety Certified: CertiPUR-US certified foam ensures a safe sleep environment.
  • Convenient Shipping: Ships compressed and rolled; expands fully within 48-72 hours.
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Current price is $74.88
Price when purchased online
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  • Free 90-day returns
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Customer ratings & reviews

4.3 out of 5 stars
stars4,694 ratings1,059 reviews
How item rating is calculated
  1. 5 stars71% (3,332)
  2. 4 stars11% (513)
  3. 3 stars5% (230)
  4. 2 stars3% (144)
  5. 1 star10% (475)

Reviews summary

Pros
  • : Offers comfortable sleep surface at reasonable cost.
  • : Designed for kids' comfort and support.
  • : Provides a gentle sleeping surface.
  • : Requires minimal effort and time.
  • : Provides a comfortable surface with right firmness.
Neutral
  • : Can be too soft for some, but also provides excellent support for others.
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Showing 1-3 of 1,059 reviews

Oct 22, 2024
Reyna
Item details
Bed size: Queen
Mattress thickness: 8 in
5 out of 5 stars review

Verified Purchase

Love it !

So I waited a copy of days to post my opinion! Me and hubby were having trouble getting rest ..so I decided to buy this item …let me tell you it is very comfortable. It expanded amazingly well maybe even bigger.. I follow all instructions—- no smell ..All comfortable I got a queen size price was good. Thank you

Helpful?6IHJLHTKI56T3533748366
Apr 19, 2025
WalmartCustomer
Item details
Bed size: King
Mattress thickness: 10 in
5 out of 5 stars review

Verified Purchase

After letting the mattress sit for about 36 hours, we tried it out for one night. I have terrible back pain from my work but this mattress was like sleeping on clouds. Very comfortable

Incentivized Review
Helpful?6IHJLHTKI56T3533748366
Jul 31, 2025
Nancy
Item details
Bed size: Twin
Mattress thickness: 8 in
5 out of 5 stars review

Verified Purchase

Excellent!! Soft, perfect when you add a 3 inch egg crate topper, and a bamboo topper! (Bad back). The bed I ordered will tell the tale when it gets here Monday. Otherwise, this mattress alone is well worth the price just by itself. I definitely would buy again, and may do just exactly that. Excellence!!

Helpful?6IHJLHTKI56T3533748366