Redken Extreme Length Leave In Conditioner is for strengthening damaged hair to grow longer and stronger. Extreme Length Leave In Conditioner helps prevent breakage so your hair can keep growing longer.  Visibly reduces the appearance of split ends by  up to 78% .  Formulated with biotin and soy protein.  Strengthens weak, fragile hair.  Adds manageability, smoothness and shine. 5.1 oz