Restylane is a clear gel formulation of hyaluronic acid that is specifically formulated to act like your body’s own naturally produced hyaluronic acid, helping to visibly correct moderate to severe facial wrinkles and folds, including the lines from your nose to the corners of your mouth (nasolabial folds or laugh lines), the corners of the mouth, and marionette lines, the area that extends downward from the corners of the mouth to the jawline.