Polyurethane Imported Three lightweight, waterproof dry sacks for backpacking, kayaking, or adventure travel; includes 2-, 4-, and 8-liter bags Soft and flexible rip-stop fabric with watertight roll-top closure for maximum compression Polyurethane-coated with watertight, double-stitched, tape-sealed seams for waterproofing 8-liter sack measures 10.75 x 22 inches; 4-liter sack measures 9.5 x 15.5 inches; 2-liter sack measures 7.75 x 13 inches Backed by the Outdoor Products Plain + Simple Lifetime Guarantee