I had sleep issues for decades. Needed to roll over often. 5 years ago I put 2" of medium foam over my mattress hoping that would lessen pressure on the many old injuries and fatty lumps and the like that I've got. Helped but still I needed to roll over me than I liked and longer spans between rollovers meant I was bruising at those locations. Added a 2" soft foam. Better but still... A couple of years I started using pieces of soft 1" foam custom cut for the worst of my problem spots. I need to semi wake and position them for every rollover but I can now lie 4 hours or more comfortably at a time! I don't ever remember sleeping so well, not even as a kid. (69 now.)