Pullman loaf

The pullman loaf, sometimes called the "sandwich loaf" or "pan bread", is a type of bread made with white flour and baked in a long, narrow, lidded pan. The French term for this style of loaf is pain de mie, or, less commonly, Pain Anglais. In the United States, many popular mass-produced sliced breads are actually pullman loaves; the slice of such breads is frequently square, with four straight crusts.