"Threading is an ancient method of hair removal originating in middle east. In more recent times it has gained popularity in Western countries, especially with a cosmetic application (particularly for removing/shaping eyebrow. In threading, a thin (cotton or polyester) 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 lines of hair"---http://en.wikipedia.org/wiki/Threading_%28epilation%29