The bucket hat or fishing hat is said to have been introduced around 1900. Originally made from wool felt or tweed cloth, these hats were traditionally worn by farmers and fishermen as protection from the rain. These "Irish walking hats" were quickly adopted internationally for country pursuits because, when folded, they could fit inside a coat pocket. In the 1960s, it was widely seen in the TV series Gilligan's Island. 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.