There was a thread awhile back that dealt with helmets for competition and getting it awn. Here is an interesting full face helmet with ventilation like a bicycle helment

http://64.226.148.152/main/product/searchDetail2.asp?ProdID=10466&BrandID=13

It’s designed for pit crews but looks like it could be really good for rock crawling comp and general gettin it awn.

What do you think? Wonder if anyone else makes one?