Nioxin System 1 Duo is designed for natural hair experiencing light thinning. This routine helps cleanse the scalp, remove impurities and improve the appearance of hair density. Used together, the shampoo and conditioner support a healthier scalp environment while leaving hair stronger, thicker and fuller. Helps improve the appearance of hair density Cleanses and balances the scalp Routine designed for natural hair with light thinning BOX CONTENT System 1 Shampoo System 1 Conditioner HOW TO USE Apply the shampoo to wet hair and massage into the scalp to create a lather, then rinse thoroughly. Follow with the conditioner on the scalp and lengths, leave on for a few minutes and rinse.