The lock (not provided) is threaded down a waterproof tube which runs through the visor aperture and out of the bottom of the helmet so that you can lock it to the bike. The easiest lock to use is an armoured cable lock (such as an Oxford Revolver), but you could equally use a chain lock or a regular cable lock.
Secure way to leave your helmet with your bike, and keep it protected from the weather
Suitable for chains and cable locks
Handy hook & loop hanging strap to keep your helmet off the wet ground
Lock is shown for illustrative purposes only and is not included