Sea to Summit Air Stream Pump Dry Sack. The Air Stream Dry Sack Pump is a dual purpose dry sack and pump. It features a low profile valve plug that is compatible with our multi-function valve found on all of our sleeping mats and Aeros pillows. With two to three cycles of air your sleeping mat will be inflated with minimal condensation on the inside of your mat and no dizziness from puffing. The lightweight 15D Ultra-Sil Nanodry sack is large enough to store your sleep system for easy packing during the day. Specifications for Sea to Summit Air Stream Pump Dry Sack: Manufacturer: Sea to Summit Fabric/Material: 15D UltraSil Weight: 2 oz Insulation: Not Insulated Features of Sea to Summit Air Stream Pump Dry Sack Inflates most sleeping mats in only two or three compressions. Fully seam sealed with valve plug. Packed Size Big enough to store your entire sleep system but compact and light enough to not make a dent in your overall pack volume. Package Contents: Sea to Summit Air Stream Pump Dry Sack Sea to Summit Air Stream Pump Dry Sack Sea to Summit Air Stream Pump Dry Sack