The Otterbox Commuter Series for iPhone 3G and iPhone 3G S includes 3 slender, yet sturdy layers to safeguard your iPhone. First, a self-adhering clear film protects your touch screen from scratches. Second is a soft, silicone skin that wraps around your device. Finally, a one-piece, custom molded polycarbonate shell hugs tightly around the silicone. While in the case, all functions of the iPhone remain fully intact. These combo packs were put together to add some color to your Commuter Series case. Choose from three color packs that each include one black Commuter Series case for your iPhone and two interchangeable colored shells.