Listerine Advanced Defence Gum Treatment Mouthwash 500mlLISTERINE® Advanced Defence Gum Treatment is clinically proven to treat gum disease for healthier gums. LISTERINE® Advanced Defence Gum Treatment creates an invisible protective shield that helps prevent plaque germs from attaching to the gums, allowing gums to repair and restore themselves to a natural, healthier state.Pack size: 500ML