As I've gotten older my hips have gotten more sensitive to sleeping on the ground. Moved from self-inflating thermarests to an Exped DownMat 9 (Very comfortable and great insulation) and have now settled on a Nemo Cosmo Insulated pad   (You need to Login or Register. Its wider, thicker and longer than the Exped. Inflates a little easier and deflates much easier. Super comfortable. I also use a Big Agnes Air core pad when I want something smaller and lighter and nearly as comfortable .