Infusium 23 Original Pro-Vitamin Leave-In Hair Treatment (33.8 oz) infuses hair with a Pro-B5 Vitamin formula to deeply penetrate and repair the hair cuticle layers from damage. Improves the manageability of hair for better styling and increased shine and luster, while it detangles and strengthens, helping to protect against breakage. 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 Protects against split ends and breakage.