Airstream Pump Sack Storage by day, pump by night. The Air Stream Pump Dry Sack features a low profile valve that connects to the multi-function valve on all of our sleeping mats – Air Sprung Cell mats and Self-Inflating mats. Used with an Air Sprung Cell mat, two or three cycles are enough to inflate the mat while adding minimal condensation. With a Self-Inflating mat, the pump will 'top off' your mat quickly and efficiently. The lightweight 15D Ultra-Sil dry sack is large enough to store clothes or a sleeping bag inside a backpack. Tech Specs Materials 100% nylon Specifications Weight: 48 g | 1.7 oz Packed Weight: 48 g | 1.7 oz Dimension: 63 x 20 x 26 cm | 25 x 8 x 10 in Packed Size: 69 x 3 x 43 cm | 27 x 1 x 17 in Length: 63cm | 25in Key Features Inflates most Sea to Summit Air mats in only two to three compressions. Fits all Sea to Summit sleeping mats – Air Sprung Cell mats and Self-Inflating mats Fully seam-sealed dry sack with integrated connector 20 litre volume is perfect for storing clothes or a sleeping bag inside your pack Packs down extremely small Available Options Size One Size