YON-KA Paris Hydra N°1 Serum offers long-lasting hydration. This age defense serum uses hyaluronic acid and vitamins to improve skin smoothness. It minimizes the appearance of fine lines, wrinkles, and other visible signs of aging. The lightweight, refreshing gel serum nourishes the skin and protects against environmental damage. Skin looks plump and supple due to the boost of hydration.