Source Tactical Storm Non-Bite Hydration Valve Kit Patented non-bite Storm push-pull valve for straw-like drinking with Quick Mate Technology (QMT) 90-degree design allows the tube to be shorter, minimizing excess tubing Tactile shut-off indicator for low light operation Dirt-Shield protective cover keeps valve free of dirt, sand, dust, and pollution QMT valve tip offers convenience of disconnecting valve so tube can be easily woven through tight openings