Threading is a method of hair removal that originated in Iran, India, and Central Asia. In threading, a thin cotton thread is doubled, then twisted. It is then rolled over areas of unwanted hair, plucking the hair at the follicle level. Unlike tweezing, where single hairs are pulled out one at a time, threading can remove short rows of hair. Advantages cited for eyebrow threading, as opposed to eyebrow waxing, include that it provides more precise control in shaping eyebrows and that it is gentler on the skin.