Waterproof: Constructed with 100% waterproof materials to deliver protection in waterlogged environments. Heavy-duty: Rugged vinyl-coated materials stand up to heavy use on both water and land. Durably constructed: Fully welded seams result in stronger and more durably waterproof construction compared to sewn-and-taped seams. Confident roll-top closure: Our original DrySeal closure design amplifies waterproof protection. 14.5 oz Width (Standard): 9 in Length (Standard): 9 in Height (Standard): 16 in Volume (Standard): 1170 cu. in PVC-Free Dry Seal dual-strip roll-down Bottom Shape: round 1000D 19 oz vinyl-coated polyester body, 1000D 30 oz vinyl-coated polyester bottom