Originally Posted by
fietsbob
What you get in the $100 (+) helmets is engineered airflow and more holes, without losing the impact absorption .
Though it's not at all hard to find those $100+ helmets at half price or less if willing to get last season's colors. I've also never necessarily been sold on the "more holes" = better ventilation thought process. You can have 50 small holes, 30 medium size holes, or 20 large holes. In theory the same or more ventilation can be built into any of these scenarios.