Main compartment measures 17'' x 9'' x 4 1/2''. Approximate capacity 1100 cubic inches/18 liters. Comfortable back padding and supple curvaceous straps supported by 1 1/4'' nylon webbing minimize the load on shoulders. Two side net pouches with cinch cord can be used to carry 32 oz. water bottles. Exterior PALS webbing for adding other pouches and accessories. Color: Wolf gray.