he high-flow Helix Bite Valve delivers full flow with just a soft bite. The 360-degree cylindrical shape eliminates the need for a specific mouth orientation. The retreat spring sealing mechanism is leak proof even under pressure.
Features

     Cylindrical shape requires no special mouth orientation and enables omni directional operation.
     Bite valve - Unique mechanism delivers full flow with just a soft bite.
     Retreat spring mechanism is leak-proof even under pressure or with prolonged use.
     Turn-to-lock safety lock allows to completely shut-off hydration during long transfers or storage.
     Long wearing design.
     Dirt-Shield protective cover keeps valve free of dirt, sand, dust, and pollutio.
     Angled valve allows for shorter drinking tube.
     Easy connection via QMT Quick Connect Mechanism.