The medium size of the Fox collection of hydro packs, UTILITY 10L, comes with a 2 litre HydraPak reservoir for liquids and a total volume of 11.6 litres. The removable HydraPak reservoir offers an easy access, water line to mouth with 45° valve. The backpack also features a lined Fleece pocket for electronics, zipped pocket with quick access, fully adjustable straps, and an integrated key ring.