Bione Cosmetics Keratin + Argan, 80 ml, Classic Hair Oils for Women, The Bione Cosmetics Keratin + Argan leave-in treatment gives your hair everything it needs after washing. Characteristics: provides hydration and nourishment for your hair eliminates hair breakage leaves hair beautifully shiny and full of vitality gives an appealing shine How to use: Apply to towel-dried hair. Do not rinse.