When all you want is water, the CamelBak Eco-Hydrobak minimalist bike pack has you covered. It can carry enough water for a 2-hour ride and also includes a safe zip pocket for keys and essentials that measures 6'' by 4''. The New Crux reservoir also offers 20% more water per sip for faster hydration in the saddle. This bag is made with waterless dyed lining, recycled poly airmesh back panel. Includes water reservoir with 1.5L capacity.