Hypercel TPU Wave Cover/Thin Protection Slip Cover for Cell Phone Apple iPhone 4 and 4S Made of Durable, Slip-Resistant TPU Material Stronger, Tougher Case Solution than Silicone Ultra Thin, Adds No Bulk Access to all Ports, Screen and Keys Exposed for Full Accessibilities Compatible with: Apple iPhone 4, Apple iPhone 4 CDMA, Apple iPhone 4S Made of Durable, Slip-Resistant TPU Material Stronger, Tougher Case Solution than Silicone Ultra Thin, Adds No Bulk Wavy Design on Back Access to all Ports.Screen and Keys Exposed for Full Accessibilities