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Stay hydrated on longer trips with the CamelBak Mayhem Hydration Pack ($72). This technical hydration pack from Outlaw series is made of heavy-duty 1680-denier ballistic nylon and comes with a 3L bladder that holds 100-oz of water. The CamelBak Mayhem features a heavily padded media pocket with weather-resistant zipper, quick release gear straps, AirDirectory back panel with Air Mesh harness and a compound-treated OMEGA HydroTanium reservoir.