When I suit up for a formal occasion I don't usually wear an undershirt under my dress shirt with tie. One of my friends told me that I must always wear an undershirt to absorb the sweat and cover my chest shape. What is your opinion on this?When I suit up for a formal occasion I don't usually wear an undershirt under my dress shirt with tie. One of my friends told me that I must always wear an undershirt to absorb the sweat and cover my chest shape. What is your opinion on this?

no ... a under shirt looks crappy ... and it's goin make you HOTTER which will make you sweat MORE if you are a heavy sweater ... by a dress shirt that can breath ... a guy wearing an under shirt is like a chick wearing granny panties under a dress

Yes, you should always wear a T-shirt beneath your dress shirt, so there are no embarrassing sweat stains on the armpits. Even if you bathe everyday, the shirt would absorb your body odor over time, and the stench will linger even after washing