Hi Folks, this is our third Tempur-Pedic mattress and our second Tempur-ProBreeze series (due to larger bed). After 20yrs in the military both my wife and I our backs are a mess. I was diagnosed with a server back issue and the ProBreeze hybrid is an awesome mattress for anyone who has back issues. By the end of the day, it's hard to walk and the lower back is very swollen. The cool bed feels so good on my back as I lay down and by the time I go to sleep I feel the swelling beginning to reduce. The next morning my back feels so good!!! I can get up walk halfway decent and I love it. Thank you Tempur-Pedic P.S. for side sleepers! the ProBreeze hybrid mattress is great for the hips as well!