i got a helmet because i fell on my back and hit my head on the icey snow we have here and after watching other people hit there head on the ground. this helmet fits and feels better then the cheap helmets i tried on at couple of stores. the Boa was confusing at first because only one side was adjusting but with the help of DogFunk service and calling Smith it was meant to be that way. the manual doesnt explain the Boa so if you have question on it i suggest calling Smith. i wanted the brim but im happy with out it. after coming down from the hill you get hot so when you ride the lift open the vents and it seriously cools your head. i gave a 4 star because it doesnt feel like a sold built helmet. its plastic and sort of cheap feel to it, but i guess thats what makes it so light. as long as it protects my head im happy.