The Z Armband is a running armband for the Z Console range. It is lightweight, comfortable and easy to use with your smartphone attaching to your arm in one click and with one-hand. For maximum comfort, the Z Armband has a comfortable elastic strap adjustable from 20 to 35 cm. Not available in the U.S.A.
This is pretty much all you need other than for cleaning cassettes and hubs.
Works really well to clean out all the grime and dirt