Flash Serum, like flash ampoules, is an immediate anti-fatigue formula that restores the skin's good appearance, elasticity, luminosity and firmness. Optical eraser effect of wrinkles and imperfections for dazzling skin. Application mode The Flash serum format maintains all the benefits of the Flash ampoule but in a more practical format. For more hydrated and flexible skin from the first moment. 1. Apply to face, neck and décolleté after usual cosmetic care. 2. Perform a gentle massage until completely absorbed.