The helmets remains completely protected from the elements at all times. The lock (not provided) is threaded down a waterproof tube which runs through the visor aperture and out of the bottom of the helmet (see image) 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 Velcro hanging strap to keep your helmet off the wet groundLock not included. Suitable locks include: Oxford Monster, Oxford Patriot, Oxford Hardcore, Oxford Barrier & Barrier Chainlock, Oxford HD chain lock, Oxford Combi Chain 10, Oxford Revolver, Oxford Tripwire, Oxford loop, Oxford Lock Mate & Lock Mate Junior.