Since no one has mentioned Gore Bike I will. I have reluctantly reached the conclusion that you get what you pay for in bike clothing, at least when it comes to breathability. I have a J&G jacket, a Showers Pass jacket and finally bought a Gore Bike Path jacket. The Gore is perfect in my opinion. Yes, the cost is obscene, but I've worn it in summer showers comfortably and rode in a cold, 40 degree (F) shower Friday. It wicks better than anything I've experienced.