Transport
A modern bike helmet protects you partly by destroying itself.
HERE’S THE INTERESTING PART
A modern bike helmet protects you partly by destroying itself. The foam liner crushes during a serious impact, extending the time and distance over which the head stops. Earlier leather hairnets mainly offered limited padding and abrasion protection. The important advance was not simply a harder hat: it was a structure designed to spend itself absorbing energy that would otherwise reach the wearer.
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