Rusk Pro Elements Keratin Smoothing Conditioner: A daily conditioner that replenishes moisture levels instantly nourishing dull, weak, aging hair. Helps to restore elasticity, strength and vibrancy. Natural keratin moisturizes and restores youthful shine to hair. Formulated for chemically or color treated hair. Rusk Pro Elements Keratin Smoothing Conditioner has hydrating properties that leave hair renewed and restored with youthful radiance.