This Source Tactical replacement drinking tube for QMT-compatible hydration systems features a Cool Weave cover that blocks UV light and insulates, keeping your water cool and inhibiting bacteria growth. It's compatible with all Quick Mate Technology (QMT) accessories from Source. Dedicated to bringing original, functional, long-lasting gear to those who inhabit the great outdoors, Source Tactical 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.