L’Oréal Paris Revitalift Filler [HA] Revolumising Serum is a facial serum for mature skin. The formula contains a high concentration of hyaluronic acid to plump and rejuvenate skin while hydrating, toning and firming it. After four weeks of use, wrinkles are reduced around the eyes, above the lips and on the forehead. It is packaged in a dispenser that provides the correct amount of serum per use.