The Pacific Outdoor Equipment InsulMat Hyper-Lite Sleeping Pad combines the light weight and high thermal values of closed-cell foam with the comfort of open-cell, self-inflating mats. This crazy hybrid combination forms a molded closed-cell foam body that encases self-inflating shoulder and hip areas. This means you get nougats of comfy cushioning where you need it most and insulating closed-cell foam throughout this entire three-season pad. The Hyper-Lites valve placement is a result of P.O.E.s meticulous testing. Since placing the valve at an angle proved uncomfortable when campers rolled over, P.O.E. relocated it to the head where its out of the way and works much smoother with the open-cell insert.