A kaftan or caftan is a variant of the robe or tunic that has been worn by a number of cultures around the world for thousands of years. It is a long, loose-fitting garment that can be made of wool, cashmere, silk, cotton, or synthetic fabrics. The kaftan is often worn as a coat or as an overdress, usually having long sleeves and reaching to the ankles. It may be worn with a sash, and it is a versatile, sophisticated, and comfortable garment that can be dressed up with jewelry or left plain for lounging. The kaftan has no single origin, but the specific kaftan styles we know today likely originated in Mesopotamia, which includes present-day Turkey, Syria, and Iraq. The kaftan has been worn by both men and women, and it has been used by many West and Southwest Asian ethnic groups. In Russian usage, kaftan instead refers to a style of mens long suit with tight sleeves.