It stays cool for about 15 minutes. I love the comfort, but the mattress tends to get to warm. We bought this bed because some of the medications I'm on for my cancer cause night sweats and I thought it would stay cool most of the night. My best night of sleep so far was about 5 hours. Most nights it's 3 hours.

We've had our new mattress for a month now and both of us are sleeping much better with the firm mattress. Even with two full grown pitbulls, the mattress doesn't move or disturb your sleep if someone shifts their position. Both of us are getting on average 20-30 minutes of additional sleep (per watch tracking apps) than we were prior to this mattress.

[This review was collected as part of a promotion.] This is the best mattress I've ever used. I've slept on quite a few memory foam mattresses and nothing compares. I wake up feeling refreshed because I'm not tossing and turning at night. The removable cover is a huge plus as well. I don't have anything negative to say about this mattress. I read reviews that the mattress sleeps hot but I did not find this to be true.

Previously owned a medium Tempurpedic mattress and it sagged in the middle like a hammock which was terrible for my back. Thought that a firmer mattress would be better. Firm mattress is very firm and terrible for the back too, even with the fully adjustable frame.

I was having pressure point pain for years on my old mattress. From night one, my pain was eliminated. My husband was skeptical and wasn't as excited as me, but one week in he admitted it was the best mattress he's ever slept on. I love the fact that you don't feel your partner moving during the night. Nothing bad to say about this mattress . Best purchase I've ever made!

Greatest mattress ever. When we first got it we had some hesitations. Learned that you have to wait 5 to 6 seconds when you first lay down or roll over for the mattress to conform and support your entire body. We have not slept so well in years. No bed shake felt when either one gets up or down during the night. Love it !!!

This mattress is unbelievably comfortable and supportive. I highly recommend the hybrid! It has a very slight bounce which eliminates the sinking feeling of some Tempur-Pedic mattresses. I am a side sleeper with arthritis in my hips. I never wake with pain in my hips with this mattress. This is by far the best bed I've ever slept on. Absolutely worth every dollar I spent!

Firm, but doesn't cause discomfort. It is PERFECT for me. 5'5", 135 lbs, 34 yrs, female. I've never had a more comfortable bed than this. Only downside was I had to air it out for two months to get rid of that chemical smell, but I am VERY sensitive to smells. It's great now after four months of use. Contrary to popular belief, it is very supportive of activities other than sleeping. Great bed.

Wife and I were mattress shopping and overwhelmed by the caspers, purple, avocado, zinus (yes these are mattress companies!) we were lucky enough to have a local mattress store that we could try the mattresses in person! We immediately fell in love. I have bad back and shoulder pain and this mattress has really helped a ton. I no longer find myself tossing and turning in the middle of the night. My wife had also noticed the same and really loves the mattress. We both look forward to going to bed now! Too hard to explain in detail but trust me it's worth it!

[This review was collected as part of a promotion.] I love this bed so much. I have had the rhapsody before and this firm mattress is just as comfortable, if not more! It helps me sleep so much more soundly and my back doesn't hurt when I wake. I love everything about this mattress - comfort, cooling affect, firmness, and support for my body.