Constructed of rugged, clear 20 mil. vinyl that makes locating gear and equipment a snap, these bags feature a 3-roll closure, heavy-duty bottom, reinforced side wrap for durability, and a D-ring for lashing to boats, other packs and bikes. Bottom is color-coded by size.Specifications:- Height: 18- Diameter: 9.5- Volume: 1275 cu in- Capacity: 21 lit- Weight: 13 oz