Original Penguin is an American clothing line. With roots in the 1950s and 60s, the brand specialises in clothing, footwear, and eye-wear. The brand was introduced in 1955 by Munsingwear, a Minneapolis-based underwear and military garment manufacturer, when it launched the Original Penguin golf shirt in the United States. Munsingwear was for many years famous for its union suits, an undergarment consisting of an undershirt and under-drawers combined in a single garment. The company was also said to be the originator of the classic golf shirt.