Serta 10 in Twin Medium Gel Memory Foam Mattress in a Box

Even after leaving it for a week to inflate to the advertised 'normal' mattress shape this mattress has a very large crease or 'dip' in the middle and is a weird shape. It will NOT be comfortable to sleep in - in fact I doubt I will be able to sleep at all due to the large crease in the middle. Totally unusable.

I have had this mattress since 9/7/2025 and It was not cheap and I have been in distress ever since. Had it delivered, it was heavy. Unboxing was not the funnest but I'm a single 40-ish female but I got the job done. Full expandability took 2 months, it didn't become ‘rectangular' until last month. This bed is so firm that I wake up in tears, holding my lower back, the pain takes hours to go away if I didn't have my tens unit. It is WAYY too firm and it got to the point I didn't want to sleep in bed and slept many nights on the couch. I have no means to return it to the store and my Walmart return timeframe is in a couple days. This was NOT a cheap purchase by any means and it's frustrating. I took a shot in the dark because i couldn't actually feel it before purchase and I paid for delivery and for someone to pickup my old mattress (A ). I just purchased a 3 inch foam mattress topper in hopes that this will help. Everyone is different, everyone has their own preferences, it's just this mattress isn't for me and I'm going to have to work with it.

We bought one of these 2 years ago to replace a cheaper mattress purchased through Amazon. This mattress is far more comfortable. Recently, our older daughter wanted to change to a day bed and needed a new mattress. Since it has held up well, we purchased another one.

Bed took the entire 72hrs to expand. It expanded in sections the last section was the middle fold then that expanded in sections. 😂

Finally replace my old pillow top coil mattress and with this Gel memory foal mattress. I'm impressed. The minute I laid down, I felt comfortable. It really conforms to your body, which is awesome. It may not seem like a true medium as in not "sinking" like a pillow top mattress but I do feel the molding to the unique contours of my body. Not super deep but Glad I bought it! It was a very noticeable difference from my old mattress.

This is a little tall for my rv and it is definitely a soft versus medium firmness. The edge is very so so getting into it is challenging. It sleeps very comfortably and is so much better on my back and legs. Even though it has been unusually warm out, the kind where your AC struggles, this mattress has remained cooler.

Loved everything about this purchase. Serta brand, good description, medium firmness that I wanted. Arrived in compact box. Easy to open and placed on our box spring. No odors. Very comfortable and ready to sleep on that night. We had a wonderful restful night.

I had purchased an off brand mattress from Wayfair, and from the first night we slept on the bed, we had issues, but we decided since this is a new hybrid mattress, we were going to give it a go. Because it was expensive, we said we’d give it one year. Well that year couldn’t come quick enough, still had sagging issues and come to find out it was losing its shape and it was very uneven at the foot of the bed, which also gave us sheet issues! So we decided to order a new mattress from Walmart and we couldn’t be happier! And they picked up our not so old, misshapen mattress and hauled it away, no extra charge! Thank you Walmart! And never buy an unknown mattress brand. Good sleep is essential, and your body deserves the best!

I bought one of these before, for my oldest son, in a queen size. NO complaints on that one, it decompressed all the way and it’s comfortable. BUT I bought a full size for my youngest son and it had a big dip in the middle after unboxing (it’s a dip in the middle, going horizontal from the way he’d sleep, not lengthwise). I read some reviews and the manufacturers comments and they suggested waiting a week to see if it “inflated” more…it did, SLIGHTLY. There’s still a dip in the middle. He’s 60 lbs so I don’t think he’ll care, but I, personally wouldn’t be able to sleep on it.

First, the price is right !! The mattress was in-stock and ready to go. Although I ordered for same day delivery. GREAT JOB WALMART!! Communication about delivery was super !! The mattress itself is well made, super comfortable and Good quality memory foam.