Threading is a hair removal technique that has been practiced for centuries. Facial hair is removed swiftly yet meticulously from the most delicate areas of the face, including the eyebrows, upper lip and sideburns, by knotting thread to grab and pull hair out by the root. It is the best alternative to waxing and tweezing, especially for sensitive skin. Unlike waxing, threading does not remove a layer of skin during the process, which can leave the skin susceptible to sun damage. By far the least invasive method of facial hair removal, threading can target individual hairs—no matter how fine–to get the precise shape and smooth finish you want.