The Outdoor Research AirPurge Dry Compression Sack features an air permeable/waterproof fabric base that purges air for tighter compression.
In addition to waterproof protection and durability, the Outdoor Research AirPurge Dry Compression Sack features an air permeable/waterproof fabric band that purges excess air from the sack during compression, ensuring the most compact compression possible. Fully taped seams and a roll-top closure provide complete water protection.