I was in a discussion (OK, argument) with a few colleagues the other day, about how helmets have progressed through the years. It seems that US and Europe have taken wildly different paths.
In the US, the traditional leather helmet has given way (not for everyone of course, some still prefer leather) to plastic ones like the Ben II, but they have retained their shape through the years. In Europe, however, helmets have progressed from rimmed top-domes to full domes like the Gallet/MSA F1, which fully cover your head, ears and back, and have two face shields plus quick-release catches for your SCBA mask, so there's no need to remove the helmet for donning it.
My question is - are there any figures as to how many (if any) accidents could have been avoided by the use of full-dome helmets versus traditional US type helmets? I have to say that in my years in the service, I have only had things falling at me from above, so a full dome would not have provided much more protection, but maybe others have different experiences than me.