The Helmet Lock is designed to safeguard your cycle helmet when you leave your bicycle and proceed on foot. No more having to lug the ugly thing into the office and stuff it into a drawer under the photocopier. Of course there is a school of thought that says if someone needs a helmet so desperately they’d steal it….?!? Well anyhoo, it’s $12.95.
The HelmetLock is easy to carry too! It has been specifically designed to wrap snugly around your U-Lock while you’re riding. Storage is quick and simple, with no added fasteners or straps to get in the way of your ride. And at only two ounces, it’s light as can be…The HelmetLock is made from the same vinyl coated aircraft wire rope cable popular in security devices, and the metal stopper is zinc-plated steel. This is one strong device!
That's a very thin cable for any sort of security application on a bike. Most bike thieves would have a cable cutter that could cut through a cable (at least) twice that thick.
Who'd buy a second-hand helmet, anyway? That's like buying a second-hand mouth-guard or a second-hand cup. Plus, how could you know if it had been in an accident, dropped, cracked or cooked in the rear window of someone's car all summer?