From the Air and Space Division
Not sure how I ended up on this 90s era website devoted to military aviation, but I'm glad I found it. I thought this page of military flight helmets was fascinating. It starts with WWII era gear and ends with late 90s gear.
Amazing to see the advancements in 50 years, and hilarious how it seems like the helmet was the last thought on the aeroengineer's minds for about the first 20 years.
Looks like it was a "we provide the jet, you provide your own helmet" kind of a situation.
See all of them here: LINK
-Jake