A bucket hat, also known as a fisherman's hat, is a headwear design with a wide and downwards sloping brim. The bucket hat is said to have been introduced around 1900. Originally made from wool felt or tweed cloth, these hats were traditionally worn by Irish farmers and fishermen as protection from the rain. In the 1960s, it was widely seen in the TV series Gilligan's Island and was often worn by members of the Mod subculture. The modern bucket hat is derived from a tropical hat made from olive drab cotton that was issued to the US Army during the Vietnam War. These lightweight hats became popular among civilians for use in sports such as fishing, and as sun protection.