The OtterBox Commuter TL Series for iPhone 3G/3GS incorporates 3 slender yet sturdy layers to provide superior protection with STYLE. First apply the self-adhering film to protect your touch screen from scratches and dings. The second layer is a textured silicone skin with inner-coring designed to dissipate shock AWAY from your iPhone. The outside of the case is a translucent plastic shell that clips around the spine of the silicone adding extra support. Your access ports are protected with tight silicone plugs to keep them free of dust and debris. This case was designed to slide easily in and out of your pocket or purse.