The Nathan QuickStart 14oz soft flask features a push pull locking bite valve that allows you to shut off when you are not running. Fits perfectly in Nathan hydration pack and vest flask pockets and is easy to hold and sip while on the run. BITE VALVE LOCKING CONSTRUCTION The push pull locking bite valve is designed for leak proof transport and the 42mm opening is sized for easy filling. EASY TO USE AND STORE Ideal size for hydration pack or vest, pockets. The flask material is soft and conforms to any pocket for a comfortable carry experience. Push Pull Bite Valve, for easy access to fluids Max Fill design with wide flange and 3D bottom shape for more volume in shorter dimension. Flexible design shrinks as you drink reducing the movement and easily packs away when empty. Works great with all Nathan hydration vests and packs and other hydration vests that feature flask pockets. Does not feature ExoSpine™ Capacity: 14oz/414ml
