Hair extensions add length and volume to human hair to make people look bold and beautiful. They are safe when applied properly using wefts, which are strips of real or synthetic hair attached together at the top and free flowing at the bottom. Wefts are attached by sewing them to tiny braids made from a person's own hair along the back of the head, underneath the hairline so they cannot be seen. Salons can transform a person's hair with just one appointment using this weft hair extension technique.