Snugpak Dri-Sak with Air Valve 20L - BlackThe heavy duty black 20L Dri Sak with Air Valve from Snugpak offers complete waterproof, dustproof and sand proof storage for equipment or clothing. A roll top closure, with stiffener, allows you to reduce the pack size according to the contents and provides a watertight seal. The valve is used to expel air, allowing further compression. The non freeze plastic buckle doubles as a handle and d rings serve as additional attachment points or for adding