My sister is purchasing a bike soon for exercise and use mostly in a large city/ public paths. Its her birthday and I'm looking to get her a good helmet for something around $40. I read that the 2008 helmets have a rounder, smoother shape and are best for crashing. The source called it a "compact" helmet.
I have no clue on helmets whatsoever, and am hoping to get some suggestions for decent helmets in that price range. Thank you much!