CamelBak: The Mil Spec Crux™ Replacement Tube with Quick Link™ System keeps every sip insulated from the elements. Clicks easily into CamelBak® Mil Spec Crux™ Reservoir with Quick Link System.FeaturesMil Spec Crux™Replacement Tube protects against extreme weather and keeps the heat and cold outIncludes Pure Flow™delivery tube, insulated cover, QL HydroLock™, Big Bite™Valve and Cover, Quick Link™connectorClicks onto any CamelBak reservoir with Quick Link™system SpecificationsBPA/BPS/BPF Free: true