BALPS Mountaineering Lightweight Series Self-Inflating Air Pad ReviewbP PP ALPS Mountaineering Lightweight Series Self-Inflating Air Pad PJet Stream polyurethane open cell foam; Top Fabric: Diamond Ripstop; Bottom Fabric: Polyester TaffetaPStrong and lightweight; See sizing chart for dimensionsPFaster inflating and deflatingPAbrasion resistant; Long-term durabilityPNon-corrosive brass valvesP