I wear a full face helmet also for most of the reasons that FrankJBN stated. It does get hot but the helmet has vents. Also, I wear a leather perforated jacket in the summer. To keep cool, I take wear a couple of thin t-shirts and keep them doused in water. That way, the wind cools you as you are riding through the perfs. Works for me. By the time I get where I am going, I am almost dry underneath and still cool.