Nioxin Cleanser #5 for chemically treated, medium to coarse, normal to thin looking hair. Nioxin Cleanser helps to remove follicle-clogging sebum, fatty acids and environmental residues from the scalp skin and hair. Cleanses to provide thicker-looking hair. It is part of System 5 that contains 3 specialized technologies: Bioamp, Transactive Delivery System and Activ-Renewal. 10.1 Ounces.