Pea coat

[2][better source needed] Pea coats are characterized by short length, broad lapels, double-breasted fronts, often large wooden, metal or plastic buttons, three or four in two rows, and vertical or slash pockets.

The standard US Navy-issued pea coat uses Navy blue wool and sports buttons (brass for officers, black plastic for enlisted) decorated with an anchor motif.

The standard fabric for historical pea coats in the 20th century was a smooth and heavy, dark navy blue Kersey wool, which was dense enough to repel wind and rain, and able to contain body heat without further insulation.

This wool was left lightly treated after being sheared to retain much of the natural lanolin oil from sheep, thus increasing its water-repelling and insulating properties.

[10] A black leather version of the reefer jacket was worn by Kriegsmarine U-boat officers during World War II, including Admiral Dönitz.