Not that anyone may care, but the costumes in 300, including the helmets, were totally unauthentic, and looked nothing like what the Spartans actually wore in the actual battle. I supplied correct Spartan equipment for one of the History Channel documentaries on the real '300' which we filmed in Malta, which mached the real terain quite well. Contrary to popular belief, they wore body armor, not black silk panties, and the Persians were humans (not orcs), and probably didn't have flute playing goats to supply music for nightly orgies. Anyone interested in making realistic Spartan equipment ofthe Greek and Persian Wars should go here -
http://www.livinghistoryworldwide.com/group/spartansociety/