Wenzel Whistlestop Waistpack with 20-Ounce Bottle (Grey/Red) 9.5 inch x 6.5 inch x 3 inch size, with capacity of 75 cu in. 2 zippered compartments and back panel for support Mesh over molded ventilated foam with integrated air channels 20oz BPA free LDPE bottle with horizontal pocket MP3 Easy access pocket