Exped Schnozzel Pumpbag UL SAVE YOUR BREATH - The Schnozzel Pump bag rapidly inflates sleeping pads so won't waste your breath; Fits all Exped mats with 20mm valves; Attach to other brand mats with Universal Valve Adapter, sold separately WATERPROOF UTILITY - It doubles as waterproof compression stuff sack or a pack liner to keep your gear dry and compartmentalized while backpacking, rafting, hunting, or mountaineering HIGH-QUALITY BUILD - 20 D Ripstop nylon withstands heavy use in the backcountry; Backed by 2-year warranty EASY INFLATION - Attach the pumpbag valve to the valve on your mat, open the bag up to capture air, close it and roll the top down a couple times for a good seal, and push the air into the mat