The Storm hydration valve kit from Source Outdoors offers a higher flow than most bite valve designs with a push-pull operation -- no biting required. It offers a hands-free operation with a tactile shut-off indicator for low light operation. A sealing mechanism locks the valve shut with a simple twist (ideal for extremely cold weather), and the QMT valve tip offers the convenience of disconnecting the valve so the tube can be easily woven through tight opening. The 90-degree design allows the tube to be shorter, minimizing excess tubing around your chest and creating an ideal drinking angle. It also comes with a Dirt-Shield protective cover that protects the valve from valve from dirt, sand, dust, mud, and other pollution. Dedicated to bringing original, functional, long-lasting gear to those who inhabit the great outdoors, Source Outdoors has been a groundbreaker in hydration system technology and is also well known for its tactical gear and hiking sandals. Tested in the most extreme conditions, hundreds of thousands of Source hydration systems are in use in the field.