The BLACKHAWK! S.T.R.I.K.E. Cyclone Hydration Pack is a versatile, rugged backpack is NTOA reviewed and approved and has quickly become a customer favorite! The pack includes a 100 oz. BLACKHAWK! Hydration System that is protected by Microban antimicrobial technology and features a Bite Me bite valve and patent-pending quick-disconnect system. Features: Twin compartments for extra storage; large compartment has internal pouch for radio packs and three antenna ports with flaps; over 100 external S.T.R.I.K.E. webbing attachment points; anodized D-rings and quick-cinch buckles for compatibility with 3-Day accessory pouches; reinforced waist belt with additional attachment points; padded, contour-fit shoulder straps with sternum strap; rubber drag handle; and metal grommet at bottom of pack for drainage. Main Compartment: 19”L x 11”W x 5.5”D Front-Top: 9.5”L x 7”W x 3”D Front-Bottom: 11”L x 11.5”W x 3.5”D Cubes: 1800 cu. in. / 32 L Capacity: 100 oz. / 3 L