Lightweight 13-liter roll-top, dry bag with an air-permeable base—air can be pushed out, but water can’t get in—for dry compression storage while backpacking, sea kayaking, and travelling Manufactured from bluesign-approved lightweight PU-coated 70D nylon, with a valve-free expelling nylon, air permeable/waterproof base; 10,000mm waterhead (the higher the waterhead rating, the more waterproof the fabric) Reinforced waterproof seams are double-stitched, and tape sealed; light-reflecting white interior for better visibility of bag contents Low-profile, streamlined shape saves space, and oval base resists rolling; patent-pending field repair buckle can be replaced in seconds, features D-ring for easy attachment 13-liter dry bag measures 8.7 x 7.9 x 18.1 inches when closed, and weighs 0.16 pounds; volume is 13 liters (with closure rolled three times)