Description of WXtex Dry Cylinder w/ Window No one likes a waterproof bag that doesn't live up to its name. WXtex® Waterproof Bags were developed with simplicity and a purpose in mind: keep gear dry. The roll down closure forms a watertight seal. The rounded bottom substantially increases capacity without substantially increasing space occupied. WXtex also added a transparent window made of heavy duty clear film, so boaters can see what's inside. Perfect for canoeing, kayaking, rafting, and boating. Different sizes fit into available spaces. Features: Same materials as WXtex Dry Sacks Detachable shoulder strap on the larger two sizes makes carrying easy 15L - 9.5 x 21" (24 x 53cm); 10oz (272g) 20L - 9.5 x 26" (24 x 66cm); 12oz (352g) 25L - 12 x 22" (30 x 56cm); 12.5oz (352g) 35L - 12 x 28" (30 x 71cm); 14oz (397g)