Polo shirts, unwrinkled, are an appropriate choice if you know the environment will be quite casual, outdoors or in a very hot location.

Projected on the window of the Ralph Lauren Madison Avenue store is a 67-inch image of items including polo shirts and tennis ball boy or ball girl uniforms.

But Keith Simpson and his six friends from Sydney — all Disney fanatics sporting matching polo shirts that show Mickey ears over Australia’s map — couldn’t have been happier.