Good rest and a light pack are both essential in backpack journeys. Hence, we made ZERO PUMP the lightest and smallest outdoor pump that shaves weight off people's packs and quickly builds a sleep system. It is smaller than a Snickers, weighing only 1.2oz, and measuring 1.02* 2.95 inches. Lightweight and compact features make ZERO PUMP to be easily hung on a key ring holder as your everyday carrying essential, saving the space of your backpack.