Why mess with the classics? From the soft flask handheld that started it all, our 14oz updated version features an integrated hand strap and rigid ExoSpine™ for superior comfort and efficiency. With small stash pocket, this is the perfect pairing for marathons, trail running, hiking, cycling, climbing and any other outdoor activities.HANDS FREE Ergonomically-designed hand-strap provides grip-free comfort, and maximizes running efficiency. Breathable wicking mesh under hand position provides superior grip while the ExoSpine™ creates superior hand feel and support for the soft flask.MULTIPURPOSE 14oz. BPA-Free soft flask with bite valve can be easily removed from sleeve and used in NATHAN hydration vest pockets.