3 ms·
The article isn't really talking about protective headgear in general, it seems to be specific to the origin of the modern day "hard hat", whose make and style
by NikolaeVarius 7y ago
The article isn't really talking about protective headgear in general, it seems to be specific to the origin of the modern day "hard hat", whose make and style can be directly attributed to the helmets worn in WW1.