ITEM NAME:Climbing climbing hydration system for sports & outdoor climbing X3L9 Climbing climbing hydration system for sports & outdoor climbing X3L9 Reservoir capacity: 2L It is a compact hydration pack adopting a seamless joining process It adopts a convenient chew valve and can stop drinking while exercising without stopping for hydration supply It can be used for many purposes such as mountain stream fishing, bicycle / mountain climbing, rock climbing, running, marathon 100% odorless, tasteless, FDA certified, BPA free, strong antimicrobial, high water resistant material Large opening Easily clean and dry using large openings that allow access to the inside surface Easily add ice from a scoop or ice dispenser to enjoy cold water Mouthpiece Easy