Look out for these key features when choosing a helmet:
Fit: To determine your size, measure the circumference of the widest part of your head, just above your ears. Though you could ask your friends if your head appears small, large, and/or disproportionately-sized, taking a more scientific approach will provide a reliable answer and could save you from an awkward conversation.
The better the fit, the better the protection. To this end, helmets have varying degrees of adjustability. A BOA system adjusts 360-degrees, offering the best fit in every direction.
Safety: For top-notch noggin defense, look for MIPS or SPIN technologies. These dynamic systems diffuse multidirectional forces, lessening the severity of rotational impacts that cause concussions and brain injury. Don't mess with your head. It�s too important.
Comfort: Hot-headed? Opt for a climate-controlled helmet. Vents give you the option to stave off an impending brain freeze or revel in the sensation of wind on your scalp. Dual-zone ventilation offers the best breathability and easily adapts to fluctuating temps.
Check to make sure the brim of your helmet lines up nicely with your goggles, or you may run into the notorious gaper gap (bare skin on your forehead). On bitter days, your forehead could freeze and on lovely spring afternoons, you might wind up with interesting tan lines.
If your typical ski day consists of jamming out and lapping the park, a helmet that is compatible with wireless audio could be revolutionary for you. Or, if you wear mittens, magnetic clasps may save you from a lot of frustrated fumbling when you clip into your helmet.