waterproof iphone 4/4S armband case, sport case ,arm belt case ,arm belt case ... -collision,washable.2.Special designed,compatible to iPhone 3G/3GS/4S.3.Flexible magic paste is convenient to ajust the length ... .4.Transparent cover,easy to control your phone.5.OEM,ODM are welcomed. running armband case for IPHONE 4G/4S,with custom logo