Light and thin: 10g (weight) and 0.1mm (thickness) only. You can hardly feel its existence.Strongly protective:High quality aluminum alloy guarantees its strength and firmness. No worry for "curved" iPhones.High grade internal cushion: No scratch or scuff on the metal surface of you iPhone. Provides bump and shock protection.Seamless transition and smooth metal surface: Perfectly fits your iPhone. Feels just like your original iPhone.Full access to all iPhone functions, reserved signal holes at four angles to ensure strong signal strength, outer edge protection, two-tone coloring, and ease to put on and take off.