This Scalp and Hair Care System 4 Volumizing cleanser helps to remove follicle-clogging sebum, fatty acids and environmental buildup from the scalp and hair follicles. The formula cleanses to provide fuller-looking hair. Keep your hair looking its best with this Nioxin System four cleanser and therapy conditioner set. Specifically designed for fine, thinning or chemically treated hair, this set helps make your hair look fuller by increasing each strand's thickness as well as reducing hair loss by strengthening your locks against breakage and damage. This set also keeps your scalp feeling rejuvenated.