That's why I decided to buck my usual trend of flannel and oxford cloth in favor of a madras shirt today. I wore it under a sweater and I quite like how it looks. It's fun and bright, on a day when the weather is dreary. It definitely requires and undershirt to work out. This particular shirt breathes so well it feels as if you're not wearing a shirt at all.
It's an unusual shirt, too. Osh Kosh B'Gosh for adults? Made in USA? I checked the RN number and it was made for them by Van Heusen. I can't get a read on its age, but it must be a few years old given that (I think) Van Heusen shipped all their production overseas in the 90s.
I have another madras shirt hanging up in my basement waiting for warmer temperatures and I think it's coming upstairs to mingle with the rest of my winter wardrobe.