A necktie (or a tie) is an article of clothing worn by men. A tie is part of an ensemble (or outfit) of clothing called the "suit and tie." This outfit is worn in Western countries by men in professional jobs such as business, law, and politics.
Ready-tied bow ties are available, in which the distinctive bow is sewn and a band goes around the neck and clips to secure. Some "clip-ons" dispense with the band altogether, instead clipping to the collar.