WEATHERPROOF PACK Designed to go anywhere in all conditions. The Hauser is a complete weatherproof hydration pack - constructed to ensure your gear will always stay dry. ***Hydration pack sold separately. The main cargo compartment is secured by a roll-top closure which can also be used in the flap-down configuration to provide additional coverage for the front zippers. - Perforated back panel and shoulder straps - Equipped with a frame sheet for added structure - Four weatherproof exterior pockets - Included tool-roll - Secured by a roll-top closure - Compatible with most hydration reservoirs up to 3 liters - including Camelbak, Hydrapak, Platypus, and Osprey/Nalgene - Made in the USA from US and imported components SPECIFICATIONS - External Dimensions : 8.5" x 20" x 5" - Internal Volume : 610 cu.in. (10 L) - Weight (Empty): 1.9 lbs .850kg