I have a Fox carbon fiber pro weighs 2 1/2 lbs aprox which is
heaver than the OS version I believe because here in Australia
we have to have thicker shell because our skulls are thinner
Making our whole helmet market regulated so that unless it passes
the Australian standards an has the sticker on it you are not riding
with an approved helmet.
Airhoh look great but in the land of the thin skulls are not allowed,
unfortunately as that would have been My first choice.
From reading up on deaths
from M/C accidents involving head injuries, most occur from
intrusions through the visor area in hitting the roof-line of a car
of amco barrier etc, nothing to do with the actual penetration
of the shell of the helmet. Conclusion is someone is protecting an overinflated
price market here in Australia for helmets.
MX style helmets are bad in that the extended chin guard
tends to cause more fractures of the skull base I think they call it a ring fracture,
This is a problem with all full face helmets so an open face is less likely to
break your neck but you have other consequences unfortunately not pretty.
A lighter helmet is always going to be a benefit in that it will put less strain
on the neck/skull in an accident so weight is very important IMO.