I purchased this mattress for a platform bed and it fit perfectly and is very comfortable.I was experiencing some back issues and it appears that some of those issues have been resolved because of the pressure relief feature.I noticed that I was sleeping longer into the night. I also like the cool feature and the medium firm foam feel of the mattress.I am so happy with this purchase that I am considering purchasing another one of these mattresses for another one of my beds.I would recommend this mattress.