Ultimate Direction Uno Waist Pack, Plum 20oz/.6L Botttle Included Weight 8.5oz/241g Storage 40 in3/.6L 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 Bottle lock bungee system keeps bottle in placeespecially handy during transport Strap Secure webbing control Reflective piping