This hydration pack provides 830 cubic inches ofinternal storage space and the Blackhawk patented S.T.R.I.K.E. molle system for modular attachment of BlackHawkA(R) accessories. With 750 cubic inches of internal storage space, the S.T.R.I.K.E. Predator offers big capacity while conveniently accommodating modular BlackHawk accessory attachments. Constructed of 1000 denier nylon with reinforced stitching Includes 100-oz. BlackHawk hydration reservoir Drink system protected by Microban antimicrobial technology Bite Me bite valve and patent-pending quick-disconnect system High-quality YKK zippers and easy-grip pull tabs Multiple rows of S.T.R.I.K.E. webbing for attaching pouches or accessories Padded, contour-fit shoulder harness with sternum strap Reinforced drag/carry handle IVS (Intercooler Venting System) back panel for ventilation Compartment for second optional hydration reservoir Dimensions: 750 cu. in./12 L (total), 16A 1/2L x 9.5A 1/2W x 2.5A 1/2D (main comp.), 9A 1/2L x 9.5A 1/2W x 2.5A 1/2D (front comp.) Capacity: 100 oz./3 L