20oz/.6L Botttle Included * Weight 7.75oz/220g * Storage 25 in3/.4L * Lightweight mesh material on the holster ? Ultra-wicking Hydrophilic Interlock back panel provides optimal ventilation and Ciba antimicrobial finish helps prevent odors ? 300D Polyester Baby Ripstop ?Nylon Mesh * Tight fitting, canted bottle holster ? Strap Secure webbing control ? Reflective piping