Ford Motor Company once made helmets designed for the army.

https://lemmy.ca/post/61529988

Ford Motor Company once made helmets designed for the army. - Lemmy.ca

Lemmy

Good luck taking a round to the head even with this thing on.
It could stop shrapnel from shells. Artillery was responsible for the majority of casualties in WWI, not guns.
Fair point, even with guns there’s spall that can get you if the bullets hit something hard, but the fact that we don’t use this kind of design kinda highlights that it’s not worth the trade off of visibility vs protection.