Product description: The Mil Spec Antidote Replacement Tube with QuickLink System keeps every sip insulated from the elements. Clicks easily into CamelBak Mil Spec Antidote Reservoir with Quick Link System. Antidote Replacement Tube protects against extreme weather and keeps the heat and cold out. Includes Pure Flow delivery tube, insulated cover, QL HydroLock, Big Bite Valve and Cover, Quick Link connector. Clicks onto any CamelBak reservoir with QuickLink system Materials: 42 in (106.75 cm) PureFlow tube.