OtterBox offer three types of cases for the iPhone 4, each with different amounts of protection, the Impact case offers the most value for money. The OtterBox Impact Series for iPhone 4 is a mighty skin that offers surprising protection paired with full access to your iPhone's functions. This case merges durability, impact absorbing features and style in a single, slim-fit silicone layer. It is a tough and rugged silicone case. The perfect case for your iPhone 4, if you want to maintain the style and shape of the device this case does that with ultimate protection included.The OtterBox Impact Series is strong everyday protection. Made up of dual-layer, impact-resistant silicone, this case protects your Smartphone from the bumps and dings of a busy lifestyle. The OtterBox Impact Series is a durable silicone skin, brilliantly engineered with inner coring to dissipate shock away from the device. All buttons, ports and functions are accessible right through the case. This case had an ergonomic design that your hands will love to be wrapped around! This case also comes with a self-adhering clear protective film for your screen so you never need to worry about scratching your screen again, there is a cleaning cloth and installation card included to ensure you don't get any dust bubbles during the application process