L'Oreal Pro Fiber RECOVER Leave-In is meant to be used on over processed, chemically treated medium to coarse, very damaged hair.  Pro Fiber Recover Leave in is a light serum which will strengthen and condition your hair strands.  Meant to be used as the final step of the Pro Fiber Recover 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.