May a woman wear a man’s polo shirt from the men’s section because it is looser and thereby more tzanua than the women’s shirts? If no one can tell it’s a man’s shirt, is it still considered Beged Ish?

The general principle is that any shirt which in your community or city is considered a male garment is forbidden for woman to wear. This, despite good intentions behind it. If it is common for women to walk around wearing a polo shirt then it is permitted. Rabbi Binyamin Bemberger