The 10/12/15mph thing is nonsense and irrelevant.
Think about glancing blows, where you are skiing, take a fall and start sliding, in your slide your head strikes a rock, not a direct impact but a sliding blow as you go over it.
A helmet is a _HUGE_ benefit here and the speed at which you are sliding is not relevant since it is not a direct impact.
I'm sick and tired of people using that garbage argument against wearing helmets. If you don't like wearing them because you don't think they look cool that is your decision but just say that, don't try to spew crap about them being ineffective it's not true.
Think about glancing blows, where you are skiing, take a fall and start sliding, in your slide your head strikes a rock, not a direct impact but a sliding blow as you go over it.
A helmet is a _HUGE_ benefit here and the speed at which you are sliding is not relevant since it is not a direct impact.
I'm sick and tired of people using that garbage argument against wearing helmets. If you don't like wearing them because you don't think they look cool that is your decision but just say that, don't try to spew crap about them being ineffective it's not true.