0 a hard hat that covers and protects the whole head, worn especially by motorcyclists
They were dressed alike in coveralls with short quarter-length space boots and round plastic crash helmets.
I noticed that a spare crash helmet had been perched on the pillion.
Riding without a crash helmet too often leads to a certain recklessness.
After all, what does a crash helmet do?
It was useless as a crash helmet: it was not really a crash helmet; it did not protect the rider.
Whatever our views, we can agree that the crash helmet law is easily enforced, but not so with seat belts.
A crash helmet, however, is something that a man wants for going round the country on his motorcycle, which is not quite the same thing.
Any crash helmet is better than none, and some already on the market are quite good.
