The first generation nanos had such a soft plastic casing that even cotton jeans would scratch it

I did accessorize with a clear case, armband carrier and FM transmitter/charger for the car to protect the beast and adjust to the way I use it

I definitely recommend getting some type of protective case -- what you need will depend on exactly how you expect to use the Nano (e.g. does it need to dock while in its case, do you want it attached to a belt clip or