We never saw polo shirts going out of style. These are one of the best style options for a business casual look for men. Polo shirts for women works wonder the same way. To get a casual business look with polo shirts you need to keep the top buttons done. It creates a polished troupe. For such a look, the t-shirt must not be too tight or too loose. Hence, pick a shirt in which you can move comfortably. If you are heading for a formal event, tuck in the shirt and add a layer to the blazer.