Dimensions: 18" x 10" x 5". Weight: 20oz. 15 Liter capacity. Two compression straps around the perimeter of the pack. Hand loop. Hydration system compatible. Flat front pocket with zipper....

5.75" overall. Pocket clip. Screw cap. Black anodized aluminum body. Pressurized ink cartridge. O-rings make it waterproof when cap is screwed down. Accepts standard Parker and Fisher Space Pen refills....