Infusium 23 PRO Original Leave-In Treatment infuses hair with a Pro-Vitamin B5 formula to deeply penetrate and repair the cuticle layers from damage. Detangles and strengthens, while helping to protect against breakage. Improves the manageability of hair for better styling and increased shine and luster. Original Leave-In Treatment formula is lightweight, so it won’t weigh hair down. Can be used immediately following chemical processing to help seal the cuticle, leaving hair healthy-looking with superb manageability and shine. Detangles while adding manageability and shine. Use after a chemical service to help seal the cuticle.