Filling your air pad just got a lot faster and easier with the new Vortex™ high-capacity pump sack. This smartly designed pump sack features a massive chamber that fills with ease, a stay-open collar for hassle-free inflation, and durable ultralight PU polyester that rolls up without adding bulk. Vortex™ fills a regular air pad completely with 2-3 fills and greatly reduces the amount of moisture that enters the pad.