For Fine, Chemically Enhanced, Noticeably Thinning Hair A daily volumizing cleanser that gently removes residue & DHT from the hair & scalp & safeguards the scalp from drying irritation. This Product is developed by Nioxin lab with advanced formula, which are: Bio Amp adds thickness & strength. Glyco-Color Shield Dual protection technology designed to safeguard the scalp skin & preserve hair color. Scalp Protection: Formulated with herbs & botanicals to moisturize & help guard the scalp skin from chemical service residues. Hair Color Protection: Custom-built molecular technology designed to provide CLINICALLY PROVEN* color protection & vibrancy. Scalp Access Delivery System helps protect nutrients at they moisturize & energize the scalp & hair combined with SPF 15 scalp protection against UV rays. How to use: Apply to wet hair & lather, leave on for 1 minute, & then rinse thoroughly. For best result, follow with other two Nioxin System 4 products.