This innovation compression dry sack uses air permeable eVent® fabric on the base, which allows air to be pushed out of the sack, while stopping water getting in. This is a lighter, simpler and more reliable solution than a purge valve. The body is made of a tough 70D Polyurethane-coated fabric. It has a non-wicking roll-top closure like the rest of our dry sack range and a lid with four straps for even compression. Features:• Air compresses out, water can’t get in• Compact and lightweight• Waterproof and air permeable eVent® fabric base• Waterproof seams, double stitched and fully tape sealed• 10,000mm waterhead, lightweight durable Nylon fabric• Non-wicking roll top closure does not wick moisture• Reinforced stitching on all stress points• Grab handle on base• White interior for better visibility• Compatible with Field Repair Buckles Volume: • XS: 6L• Small: 10L• Medium: 14L• Large: 20L• XL: 30L Volume Compressed:• XS: 2L• Small: 3.3L• Medium: 4.5L• Large: 6.7L• XL: 10L Weight:• XS: 107g• Small: 129g• Medium: 148g• Large: 168g• XL: 210g