i have an underarmour one that is light and warm. Pretty much bad ass, also doesn't have to heavy of an underlaying so you can go without an undershirt and still be ok. I won't recomend this however because if you have to wear it in a building, like school for a long period of time it can get hot. you don't want to ruin the sleves so rolling them up is out. I can't think of any other way other than benig SOL and hot.
