L'Oreal Pro Fiber RESTORE Leave-In is meant to be used on medium to thick, damaged hair.  Meant to be used as the final step of the Pro Fiber Restore at home program to see full effects.  Apply on to damp towel dry hair. Apply one to two pumps, depending on length and thickness of hair.  Will have your hair looking shiny, feeling soft, smooth and lightweight.  Hair is protected  from heat styling tools up to 450º F.