Schnozzel Pumpbag is a bag with an attachment valve that allows a sleeping mat to be inflated quickly. Using a pump bag eliminates two unsavory things previously associated with sleeping mat inflation: Having to use lung power to inflate and the resulting accumulation of moisture inside the mat from vapor-laden breath. The latter can encourage (in any air-holding gear) the process of hydrolysis to break down coatings and laminates on the inner walls, so it&&';;s good to avoid blowing into mats.Over the years, it&&';;s evolved to be higher in volume, lighter, more compact, and more versatile (EXPED&&';;s signature tinkering-to-perfection in action). Because it can be used as an ultralight waterproof stuff sack for clothing or a sleeping bag on the way to camp, its net weight is essentially zero. There are two ways to make a piece of gear lighter - build it out of light fabric and materials or design it to perform one or more functions. Schnozzel Pumpbag does both!