Extremely light, and packs down to the size of a fist! Great for throwing in a travel bag! Waterproof 30D Cordura ripstop nylon with a siliconized waterproof coating and internally sealed seams Hypalon roll top main compartment with 24-Liter capacity Detachable, rolltop storage bag- optimized for fast pack up Dimensions - Unpacked: 19.5 X 11 X 9.5 Inches. Weight 6.6 ounces. Packed: 5 X 3 inches. Adjustable, removable chest strap and front organization pocket with water resistant zipper