The number one selling salon brand for thicker, fuller looking hair*. Nioxin is the only professional haircare brand endorsed by the Institute of Trichologists for thinning hair. Nioxin System 2 Treatment for fine, natural and noticeably thin hair is a volumising cosmetic leave-in treatment that contains antioxidants and botanicals that help to provide a refreshed scalp environment. It contains SPF 15 sunscreen to help protect the scalp skin for noticeably thinning hair. Application: Apply directly to entire scalp. Gently massage into scalp. Do not rinse. May cause temporary redness to scalp skin after application. Only 2-3 pumps needed. *Value Data Kline & Company