Ultimate Direction Access Waist Pack 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