Internal Suspension


E.D. Bullard hard Boiled     Photo: Bigstock

The 1919 E.D. Bullard Hard Boiled had an interior harness that provided a one-inch gap between the shell and the wearer’s head, enabling it to fend off objects dropped from above. The same suspension design has been the basis for many climbing helmets, like the Petzl Altios, ever since.

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