Features of the MP3 TPU case 1.the tpu case designed in wrist watch style and you could put it on your hand without worring about it ,it is very convenient for you 2.environment friendly tpu material and you could recycle them without pollution to the environment 3.many colors for your to choose and you could pick up anyone you like 4.there are many little holes on thewriststraps,it makes the straps full of elasticity