This polo will keep you warm in the winter.  It's much thicker and warmer than standard polos.  I did find that the collar stretched out after about 4 - 6 months, and I can't wear them anymore to my office setting.

Still fine for other uses though, but do take care handing the shirt, particularly stretching around the collar.  (I never buttoned shirt when I hung it on a hanger, so that may have played a role).

If it didn't stretch out, it'd be a great shirt.