New for 2012: This pump sack will inflate your NeoAir™ mattress quickly and easily, but its function doesn't stop there. The 40-liter sack doubles as a stuff sack or pack liner, and can also be used to convert a NeoAir™ mattress into a Jembe-style camp seat. Just insert a rolled NeoAir™ mattress and inflate for lightweight campsite seating.