The original they're harkening back to is the 1960s Bell Star helmet, allegedly the first full face helmet ever to go into production. The inherent beauty in the Star’s simplicity has made it something of a design icon (didn't old school LEGO men rock this helmet shape?), so it's little surprise that they'd want to bring it back, dust it off, and get it up to today's rigorous DOT safety standards.
To do said dusting they tapped legendary custom shop Roland Sands Design, masters of retro ruggedness. In case it wasn't obvious, these dudes have a flair for the McQueen era of moto-styling.