CamelBak Men's Cloud Walker 2.1-Liter Hydration Pack (Black/Graphite) Combination hydration/cargo pack with 2.1-liter liquid capacity Easy-to-fill, insulated Omega reservoir keeps liquids cool for hours 1,282 cubic inches of cargo space; front pocket organizer holds electronics and valuables Removable waist belt and air mesh back panel add stability and ventilated comfort Bite valve cover keeps bite valve clean and protected; 2-year warranty