Also known as a "toggle coat," this old world piece of outerwear was first made for Britain's military. The name is derived from Duffel, a town in Belgium where the thick, woolen material originates. Like any good classic, its straightforward styling never really went out of fashion. And while it might have taken a backseat to the pea coat, there are still some solid options to consider this winter: from Club Monaco's monochromatic take to more modern cropped styles from H&M and Kolor.