The Nioxin Cleanser 1 is specifically formulated for fine hair that is showing signs of normal to thin looking density. This professional cleansing system helps to remove product build-up, sebum, and environmental residues that can clog the scalp and block hair growth. Its gentle yet effective formula prepares the scalp and hair to receive the subsequent steps of the Nioxin treatment system, optimizing the environment for fuller-looking hair retention and density.