

❄️ Sleep smart, stay cool, and wake refreshed every morning!
The Serta Sheer Slumber 8-inch Cooling Gel Memory Foam Mattress combines innovative cooling gel technology with a durable medium-firm foam core to deliver balanced comfort and support. Packaged in a compact mattress-in-a-box for easy delivery and setup, it offers a 100-night trial and 10-year warranty. CertiPUR-US certified for safety and eco-consciousness, this twin-size mattress is designed to keep you cool, comfortable, and supported all night long.














| Best Sellers Rank | #144,828 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #410 in Mattresses |
| Brand | Serta |
| Cover Material | Polyester |
| Customer Reviews | 4.3 out of 5 stars 739 Reviews |
| Item Firmness Description | Medium Firm |
| Product Dimensions | 76"L x 40"W x 8"Th |
| Size | Twin |
| Top Style | Tight Top |
A**M
Good for finicky joints.
It is comfortable. The firmness is comparable to a freshly fully blown up air mattress. It works well for my hypermobile joints, is enough cushion to not dig into them but not cushioned enough to have problems supporting the joints. It was a pain to get out of the box and would not be able to be returned the way it came if there was an issue. I think it's a good value, but I don't have any previous experience buying a mattress.
L**M
Perfect low profile mattress for trundle bed
Searched for days for the perfect mattress for my daughter’s trundle. Super comfortable but still firm and great quality. So fantastic my sister has purchased for her children as well. Highly recommend!
R**.
Decent value
Decent for money. Using for occasional guests. Every day use would not be comfortable
M**X
I tried 6. This one is the best!
Sleeping soundly and arising with no sore, achy places. Yay!!! 👏👏👏👏👏
J**2
Firm and so comfortable!
I had guests coming in for the holidays so last minute, I got a new daybed in my guest bedroom (I’d been dragging my heels setting up my guest bedroom! Oops!) for me to sleep on (so my guests could have my large bed). This arrived about an hour before they did so I opened it around noon and was sleeping on that night. First major win - no smell! I noticed it puffed to about 6” (not 7”) but it was thick enough - in doing my research to find this mattress, I found some complaints on certain mattresses were that you could feel the springs, and this was definitely not the case with this one! The biggesg win: I have a not-so-great back and was very worried - I woke up with NO back pain. I went back to my bed just last night after my guests left and my back hurts this morning. So now I think I need to buy this for my bed! This mattress is awesome. Even though it’s a twin, I will likely sleep on it more often until I get my new mattress because it’s just so good!! Very very very impressed. (I also found Amazon had the lowest price. There were some other retailers carrying this with quick delivery, but they were about 10 to 15% more. Obviously prices change all the time so I recommend searching for the mattress to see who carries it, and where the best price is.)
M**N
Expanded unevenly
I’m between a 3 and 4 star review here. The bed is comfortable and I like that it’s considered a medium-firm, but unfortunately I had to do an exchange because the first one I got didn’t expand properly (and I waited more than 48 hours for it to expand as suggested—didn’t sleep on it either). I received a new one and I’m waiting for the other one to be picked up and removed from the house. Hopefully the memory foam on the new one expands like it’s supposed to.
A**R
Good purchase!
Good quality, firm ease to set up and my so. Loved it!
E**N
BEST MATTRESS EVER MADE.
Fantastic mattress. Second purchase. First a King then a Full Size. Firm Memory Foam that conforms to your body. Never dents or sink in permanently. Best Mattress ever. Great night sleep. Esp for people with back, hip or shoulder pain. This is the perfect mattress by far. I’m a Retired Nurse and I would suggest this mattress to everyone. Takes 48 hrs to open up completely. Best Buy Ever.
Trustpilot
5 days ago
2 weeks ago