We call it a gator, or neck gator, in the Army.
Ah you Americans had to have those silly cowboy hats.
Though of course you did come late *cough*
Twice *cough*
Too late for what? In WWI we made it just in time for the End-Zone celebration, arguably the best part. In WWII, well, we all know how that turned out, don't we?
The Germans had the best helmets in both wars, by the way, and our first kevlar helmets in the U.S. looked not unlike the German helmets from WWII. Our current kevlars look almost like the Falschirmjaeger helmets, though...