Specs: Capacity: 22 oz Technology: Push-Pull Blast Valve(TM) provides quick access to hydration and eliminates any leaks Features: Lightweight waist pack Ergonomically designed, ideal for running Quick adjust belt allows for easy on and off Angled flask holder allows for easy one-handed access and bounce-free ride Hidden phone stash pocket allows you to tuck your phone behind the flask (fits most large sized smartphones)