FIIO SK-M5A Silicone Watch Strap for FIIO M5 Music Player. The wristband is made of soft and skin-friendly silicone, which makes wearing the M5 a more comfortable experience. The black wristband can be easily replaced with another standard 20mm wristband(sold separately). The protective shell is split into an uper and lower part for better drop resistance and ability to resist more applied pressure. The two halves of the shell are seamlessly fastened together by two screws for an aesthetically pleasing look that does not sacrifice durability.