Alps Mountaineering 422093 Dry Sack Bag Medium
The Dry Sack is a compression stuff sack that features Air Control. Air control is a waterproof air permeable fabric, which allows you to compress air out and doesn't let water in. This high tech fabric gives you the ability to fully compress the contents while maintaining its waterproof integrity. The Dry Sack is the perfect compression stuff sack for wet environments (not submersible).