This unique shampoo is enriched with pearl powder and pure natural silk. CHI Enviro American Smoothing Treatment Purity Shampoo is the ideal hair preparation prior to performing the CHI Enviro American Smoothing Treatment. CHI Enviro Purity ensures the pH level is optimal for better results and longer lasting smooth hair. Ideal hair preparation for CHI Enviro American Smoothing Treatment. Enriched with pearl powder and pure natural silk Ensures the pH level is optimal for better results and longer lasting smooth hair.