Rusk Deep Shine Smooth Advance Marine Therapy Keratin Care Conditioner a daily conditioner recommended for chemically and color treated hair. Formulated with natural keratin, vitamins and nourishing marine botanicals. Seals in moisture, locks out humidity and provides lasting protection during thermal styling. Leaves hair smooth, shiny and manageable. How to use. Apply generously to wet hair and work up lather. Rinse thoroughly. Follow with Deepshine Smooth Keratin Care Smoothing Conditioner.