Made of heavy duty 600 denier water repellent p/u coated nylon. Padded back panel with built-in ventilation channels. Large main zippered compartment, two side zippered pockets. Padded hip belt, adjustable padded shoulder straps. Available in 3 sizes. 25 liter capacity measures 22"X10"X7". 45 liter capacity measures 25"X13"X12". 75 liter capacity measures 32"X18"X81/2". Available in solid black and army digital camouflage. Imported.