Ah, sorry, apparently no airbags. Perhaps a helmet makes sense then. I'm not sure if I could DD a car that required a helmet, but I think they're intending this as more of a fun weekend/track car anyways.
Honestly if it has a roll cage and 5-point harness I'm not even sure I'd feel the need to wear a helmet for my regular commute. I'm not sure what the law is about that, though.