System 4 is specially designed for noticeably thinning, fine, chemically-treated hair. It delivers denser-looking hair while protecting the scalp and providing moisture balance to coloured hair.
BioAMP - With cystine amino acids and lightweight conditioning and treatment ingredients. Helps provide thicker-looking hair by increasing the fullness of each hair strand, reducing hair loss by strengthening against damage and breakage.
Scalp Access Delivery System - With vitamins, botanicals, SPF 15 sunscreen, and purifying agents. Helps clean away follicle-clogging sebum and environmental residues from the scalp skin, while providing sun protection for the scalp.
Glyko Shield - With white tea extract, humectants, peppermint oil, and protective conditioning agents. Dual shield technology helps provide protection and moisture balance to color-treated hair, and leaves the scalp feeling rejuvenated and refreshed.