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

ADD HYDRO PACK RESERVOIRS

Made in the USA from US and imported components

10L:
External Dimensions : 8.5" x 20.5" x 5"
Internal Volume : 610 cu.in. (10 L)
Weight (Empty): 1.9 lbs .850kg

14L:
External Dimensions : 10" x 21.5" x 5.5" 
Internal Volume : 854 cu.in. (14 L)
Weight (Empty): 2.1lbs (.95 kg)