100% Nylon Ultra-lightweight 5-liter roll-top dry sack is the ideal dry storage and organizing option for fast and light adventuring when backpacking, bike touring, or travelling Manufactured from bluesign-approved 30D Ultra-Sil Cordura ripstop nylon with a slippery finish for easy packing; 2,000mm waterhead (the higher the waterhead rating, the more waterproof the fabric) Reinforced waterproof seams are double-stitched, and tape sealed, with reinforced stitching at stress points; secure Hypalon roll-top closure; fabric is translucent for visibility of contents Low-profile, streamlined shape saves space, and oval base resists rolling; patent-pending field repair buckle can be replaced in seconds 5-liter dry bag measures 6.7 x 5.9 x 12.1 inches when closed, and weighs just 0.07 pounds; volume is 5 liters (with closure rolled three times)