Re: Carbon fiber helmets??
Well....it still hovers around $600 though, so where are those savings? As pointed out to me, my usual pedantic answer here is, Arai exceeds design in some areas, more than just snob appeal. It vents and face-shield pods are designed to break away easily. While the face shield is on, ventilation is still very good. From 30 mph to 60 mph, kinetic energy quadruples. (You're probably dead at 60mph another words) so a motorcycle helmet with your head inside, slows down or stops suddenly, all that kinetic energy has to go somewhere. The weight doesn't bother me. It's strong, when I do wear a helmet, in comfortable weather.
To absorb and dissipate kinetic energy on impact, they use a fiberglass shell that doesn't deform from it's shape and has soft one piece, multi-density liner, means your skull is more likely to stay intact. It's egg shaped for perfection in strength and less rotational force as you head skips across the road. It's quiet too.
For my head, it's Arai, and a company that does a lot of testing, R&D. Personally Bell fits weird and it's a bitch to put on/take off. I didn't wear my Shoei for the same reasons. It was a noisy helmet too. Cheap stuff fails on impact, what I call an unadvertised special.
My old lady worked in an ER and claimed helmets were worthless on most dead crash victims. They do make an open casket funeral feasible though. One helmet looked fantastic but the riders skull was shattered inside of it. I don't think it was well designed but I cannot remember the brand that it was.
With exception to cool riding weather, I rarely wear a helmet. I just sell them.
If I had a 2 hour ride, Arai will feel like a cinder block in that time. Carbon may be the ticket, just call support for answers before you buy.