Offering a lightweight design, special Alpine NV back panel for multi-directional ventilation & lots of storage space for all the hiking essentials, the Camelbak Fourteener 24 hydration running backpack is a great choice for serious trekking trips & mountain adventures. This 21L-capacity rucksack enables you to comfortably carry clothes, rain gear, energy snacks, sunglasses, trail maps, trekking poles & a headlamp & has 3L Antidote® lumbar reservoir with Quick Link system featuring patented Big Bite Valve for hands-free hydration in high performance situations. The use of Hydro Guard technology helps to prevent the build-up of bacteria, while Pure Flow tube keeps water tasting fresh.