Sebastian PENETRAITT Overnight Repairing Serum with Hyaluronic Acid and niacinamide is the newest addition to the Penetraitt Strengthening and Repairing line. Penetraitt Overnight Repairing Serum provides instant moisturization to plump up dry, and damaged hair. Designed for those who love to experiment with their hair but may have experienced damage due to hot tools or coloring. Damage causes hair to feel dry and brittle with loss of shine and smoothness. Penetraitt Overnight Repairing Serum makes the hair look feel thicker while locking in moisture and banishing frizz for hair that looks and feels healthy. Wake up to softer, smoother, and more revitalized hair.