Even on my measly 2 mile commute, I have to deal w/ two short, steep inclines that take some sweat and effort to get up when loaded down w/ my briefcase & locks. My guess is during fall/winter/spring, I could pull off the suit and not be anymore sweaty than cramming into a hot, crowded subway car. But I don't need to wear a suit. Maybe what I need is a grownup job that requires me to dress like a grownup so I can spend more of my income on fashion.