This is possibly a can of worms, but I am curious:

I know helmets have a whole host of testing they have to go through before getting rating approval. Does any one know if/how wearing a bunch of hair up under it (and thus needing a larger size) changes the protectiveness of the helmet?

(For me, it's probably a good thing I will probably never show hunter, as I could not do the hunter hair thing. Having hair over my ears drives me NUTS, and I'm already prone to migraines enough without pulling my hair up and having pins poking me under a helmet. )