A tuxedo is an ensemble (or outfit) of clothing which includes a white dress shirt, a bow tie, dress pants, a tuxedo suit jacket (sometimes called a dinner jacket), leather dress shoes, and sometimes a vest or cummerbund, top hat and gloves. In European countries, this outfit is called black tie. Many men wear this outfit in Western countries on formal occasions like a marriage ceremony or a fancy party or dance.\r\n\r\nThe white dress shirt is usually made of cotton or linen. A dress shirt has a stiff collar and it is ironed before it is worn. A bow tie is usually made of silk or polyester, and it is usually black or white. Dress pants are made of wool or polyester, and they are ironed before they are worn. A tuxedo suit jacket is usually made of wool or polyester. Suit jackets have a collar, pockets, and a silk or polyester lining. Leather dress shoes are usually made of dark-colored leather which is polished. Sometimes, a person wearing a tuxedo will also wear a sleeveless vest with buttons in the front, a black top hat, and white gloves.\r\n\r\nSome men wear a tuxedo for their jobs, such as symphony orchestra musicians or waiters in expensive restaurants.\r\n\r\nSince most men do not wear tuxedos very often, they rent them when needed instead of buying them. Sometimes, men's tuxedo vests and ties match the dress of the woman he is with. They are mainly worn to big events such as weddings, dinner parties or some sort of smart dressed do.