Perfect Hair Charcoal Smoothing Therapy offers the latest innovation in hair care to bring you the finest home-use smoothing therapy available today. We have combined super moisturising natural ingredients, such as charcoal extract, and a specialised blend of amino acids, to leave the hair smooth, shiny and frizz free. The Charcoal Relaxing treatment is not permanent. It naturally fades out of the hair. The wave or curl will gradually come back in about 10-15 washes.