Wenger Tribourg Illuminated Hydration Pack Wenger hydrations packs demonstrate high standards of functionality and performance bringing new innovations and pride in every product and design. The unique electroluminescent wire light makes this pack stand out from the rest. As soon as Mother Nature's lights go out, this packs light goes on. Features; 600 cubic inch main pack storage compartment with internal organizer and interior pump pocket. Double Shot trademark bite valve, with tremendous flow rate and taste free reservoir material bring this hydration pack to the leading edge. Outside stash pocket with lashing system and compression, air mesh shoulder straps