Camelbak ratchet hydration packthe ratchet is the lightest camelbak hydration pack with the most hydration capacity its your perfect companion when youre out on hot sweaty gruelling rides as its 3l crux reservoir will keep you fuelled for 3 hours the ratchet hydration pack features a small zippered pocket for essentials and a stretchy overflow compartment for layers giving you an efficient way of hauling the bare necessities for a long ride features3l crux reservoirsmall zippered pockets