The Sea to Summit Air Stream Pump Sack can be inflated with a single breath, and within just two to three cycles your sleeping mat will be fully inflated and ready to go. There will be minimal breath condensation inside and you won\'t feel dizzy from blowing the mat up, and what\'s even better is that it can be used as a 20L dry sack to store your gear safely when on the move. Inflates most sleeping mats in only two or three breathsOval base designFully seam sealed with sealable valve plugMade from lightweight 15D UltraSilWeight: 62g