I too tend to overheat in hot, humid Midwestern summers. (I sweat on winter rides too.) Bell helmets worked pretty well for me but were not perfect. Last year I switched to the Lazer Genesis (in a white/silver combo). Not only was the helmet fit much better (no pinching or irritating spots), but the vents helped me stay cooler. I wear an Assos headband to keep sweat out of my eyes. It has been a perfect combination.

Karen