System 5 is formulated to remove follicle-clogging sebum, fatty acids and environmental residues, while amplifying hair texture, restoring the moisture level and providing color protection. Complete professional thickening treatment for chemically-treated hair with light thinning. For fuller-looking and moisturized hair. Helps remove follicle-clogging sebum, fatty acids and environmental residues. Helps provide moisture balance and smoothing control. Increases the fullness of each hair strand.