BIOLAGE ADVANCED FULLDENSITY Shampoo gently cleanses to remove follicle clogging impurities to instantly make hair look and feel healthier. When used as a system of Shampoo and Conditioner, breakage is significantly reduced for fuller-looking, thicker-feeling hair. Breakage is reduced and the hair is fortified. For maximum results, use the Densifying Spray Treatment to instantly work on the surface of existing strands and expand the hair diameter.