37L capacity. High tenacity 210/330 denier nylon and 210 denier ripstop nylon construction. Accommodates 100 oz. hydration reservoir (not included). YKK zippers. Easy access main compartment with front and map pockets. Multiple rows of S.T.R.I.K.E. webbing. Four adjustable external compression straps. Five internal tie-down loops. Padded shoulder straps and removable heavy duty waist belt. Heavy duty D-rings for securing external items. Loop fastener on front for ID patch attachment. Dimensions: Inner main compartment: 20" x 13" x 6"; Top front pocket: 14.5" x 12.5" x 2.5". Color: Coyote Brown. Bulk packed.