I purchased an 8inch mattress so that is what I was expecting. Sadly, it never 'fluffed up' passed 6 inches so it should have been the 6in mattress price. Since it's only 6 inches, I don't think it's as comfortable as it could be. We have had to leave our old mattress under it because putting this mattress on just the box spring is like sleeping on concrete. Overall, my back doesn't bother me nearly as bad as it did, but not satisfied with the 6in when I ordered an 8in mattress.