very few all cotton or poly/cotton blends are going to breathe
just wear a t-shirt as Simon suggests...
I wear an Under Armour Heatgear shirt under my cotton t's or any of the wicking tshirts and it really helps, it might help under a kung fu top
"George never did wake up. And, even all that talking didn't make death any easier...at least not for us. Maybe, in the end, all you can really hope for is that your last thought is a nice one...even if it's just about the taste of a nice cold beer."
"If you find the right balance between desperation and fear you can make people believe anything"
"Is enlightenment even possible? Or, did I drive by it like a missed exit?"
It's simpler than you think.
I could be completely wrong"