Mainstays 8” Medium Firm Memory Foam Mattress, Twin

This mattress exceeded my expectations for the price. It arrived well packaged and expanded quickly after opening. The 8-inch thickness provides good support while still being comfortable, especially for sleeping on my back and side. The medium-firm feel is balanced, not too hard and not too soft. It offers great value for money and feels durable and well-made. I've been sleeping much better since using it and would definitely recommend it to anyone looking for an affordable and comfortable mattress.

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

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

I'm almost 70 and i need a firm mattress because of a shoulder/hip injury 20 years ago. I love memory foam mattresses because the twin, my size bed, are usually under $100 which allows me to get a new mattress when i need it and that's usually every two years. This mattress isn't the most firm that i have had but it's good. i have a sheet of plywood on top of my box spring so that helps keep my body from sagging into the mattress. i use to buy the 8" but this year i had to see the help of a chiropractor, and they, both doctors, told me to do 6". A memory form mattress usually sinks to half the thickness of the mattress so an 8" will usually create an 4" sag which means my hips, the heaviest part of your body, will sink into an 8" memory foam mattress 4" as compared to only 3" off a 6" thick firm mattress. My hip needs to keep aligned as does my shoulder so i can wake up pain free. As the mattress ages, the pain increases because of the sag. my old 8" wore down into a deep sag that caused pain until i finally replace it, but the 6" only sinks 3" and my hip can handle that depth of sink which makes the 6" a better mattress for my needs. If your body needs firm support always get the thinnest mattress at the sage from use isn't deep. This mattress is good but it's more of a medium firm so i think I'll be buying a new mattress in a year but time will tell and I'll edit this review as soon as something charges. i bought it for $80 which is about the average i spend. i have bought $150 but their were 8"-10" and the same from use was painful because it was so deep. Thinner naturally doesn't compress as much because there's less to compress.

This mattress is good for both side and back sleepers. The mattress plumped up quickly and stayed that way during use. I purchased this to replace the cheap thin mattress in a sofa bed. The mattress pulls you in and gently cradles you while sleeping. It also provides nice firm seating when the bed is folded up.

It appears that the shipment may have sat in the heat for quite some time. One side of the white bed is stained blue from the blue plastic that was around it. The glue between the led lighting and Velcro all melted out and was super sticky. Not sure how long those led lights will stay on the bottom of the bed with all the glue all over my hands.

This should be considered false advertising I purchased 2 and neither were 6inches only 3inches after letting them sit opened for 6 days. Hoping they'd fully reach their 6 inches of thickness. Now in order to receive a refund I need to return them. Don't buy these!!!

This mattress is horrible. It never rose past 6 inches and is so soft and awful. We waited and waited for it to improve and it only got worse. Customer service is absolutely awful and didn't help at all nor did they give me the correct places to file a complaint even though I had receipts and pictures . There is no way a 5 star review of this product is real . I would give this 0 stars if I could

Mainstays mattress orders are experiencing delays and quality issues. In several cases, agents report the shipments as lost in transit and initiate replacements, but the original damaged items are still ultimately delivered to customers. As a result, Walmart deliveries are arriving both late and in damaged condition.

I bought this mattress for $121.90, but it never reached me. Walmart claimed the refund was initiated and even advised me to buy another queen mattress, which I did for $126.13. Later they canceled the refund and kept my money, while raising the product price. It feels like Walmart makes refunds over $100 nearly impossible. I'm left with no mattress and no refund. Very poor and disappointing service.