Nioxin System 4 Cleanser A daily volumizing cleanser that gently removes residue and DHT from the hair and scalp and safeguards the scalp from drying irritation. How it works: BioAmp adds thickness and strength. Glyco-Color Shield: Dual protection technology designed to safeguard the scalp skin and preserve hair color. Scalp Protection: Formulated with herbs and botanicals to moisturize and help guard the scalp skin from chemical service residues. Hair Color Protection: Custom-built molecular technology designed to provide CLINICALLY PROVEN* color protection and vibrancy. Scalp AccessDelivery System helps protect nutrients at they moisturize and energize the scalp and hair combined with SPF 15 scalp protection against UV rays. Hair types: For fine chemically enhanced noticeably thinning hair. 9 out of 10 people perceive an increase in hair density when using the daily 3-Part System.