The Italian term "Superleggera" (meaning 'super-light') was trademarked by Carrozzeria Touring for lightweight sports-car body construction that "only resembles" a space-frame chassis. Using a three-dimensional frame that consists of a cage of narrow tubes that, besides being under the body, run up the fenders and over the radiator, cowl, and roof, and under the rear window, it resembles a geodesic structure. A skin is attached to the outside of the frame, often made of aluminum. This body construction is, however, "not" stress-bearing, and still requires the addition of a chassis.