Ultra durable outer showcases a 'carbon-look', stylish matte finish. Modern material deflects the elements maintaining high resistance to wear, perspiration and electrolyte drinks. The silver-colored interior makes it easy to see what's inside quickly so you can turn your focus back to the road ahead. Mounts to top tube bosses. - Capacity: 23.2 in3 (380 cm3) - Weight: 2.7oz (76g)