Listerine advanced defence gum therapy 500ml mouthwash multipack this multipack of mouthwashes work by forming a protective shield around your gums that protects them from plaque and germs it also works to treat gingivitis and easing the symptoms of sore or bleeding gums it allows your gums to repair and restore themselves to a healthier state by preventing plaque from attaching to the tooths surface r r r r in this multipack you will get r r r r r r r r 6 bottles of listerine advanc