Duralumin A7075 Curvacios Bumper for iPhone 5 / 5S Black "Hyper ultimate duralumin A7075" achieved the ultra lightness of 18g. Special electrolytic coating "CANi-MITE" created the unmetallic-like hand feeling.&lt;br&gt;and, it gives you a soft, moist, and smooth feeling like a baby skin. Your hand sweat will evaporate instantly, so the fingerprint will never been left on the surface of the case. Since dye compound penetrate deep into the material, the case is resistant to scratching and peeling. This case is made with a concentration of professional expertise of Japanese experts, so this is the ultimate made-in-Japan product.