Admiral Usn Peacoat Z28P006 - Navy / M - Originally worn by working sailors and fishermen, the peacoat got its name from the historical Dutch word pije, which was a type of coarse woolen fabric. The British Royal Navy and the US Navy adopted the men's wool peacoat design from the Dutch for their own uses. This authentic navy peacoat's ulster collar that can be buttoned all the way up to protect its wearer against the cold and wind.