Griffin's Survivor Extreme-Duty Case is designed from the inside out to protect your iPod touch from extreme conditions ... dirt, sand, rain, shock, vibration and a host of other environmental factors.  Enhanced protection where and when you need it. This case surrounds your iPod Touch in in a durable, flexible silicone jacket for shock absorption. Beneath that is a layer of shatter-resistant polycarbonate for structural strength. Control buttons are covered by the silicone jacket, while ports and connectors remain open and accessible.