Is it normal to wear a shirt under a polo?
Yep.Totally normal
Yes, it’s normal to wear an undershirt under a polo. Some people like the extra layer for comfort or sweat protection; others prefer the polo on its own.
Totally normal. An undershirt can add warmth, feel more comfortable, or keep sweat from showing through. Plenty of people wear one under a polo, especially in cooler weather or for work.
It’s also fine to skip it. If you don’t want the undershirt showing, try a close-fitting one with a neckline that stays below the polo’s collar.