WHAT IT A deep cleansing shampoo designed to remove residual chlorine iron and fatty acids. WHAT IT DOES Clarifying Shampoo Three is a deep cleansing shampoo designed to penetrate the hair shaft to remove residual chlorine iron and fatty acids left behind from medication and minerals or from hard water trapped within the cortex. Shampoo Three strengthens strands and minimizes future build-up while helping to prevent swimmers chlorine green.