A revolutionary conditioner featuring the first new antifrizz technology in over 30 years. This formula weightlessly hydrates the hair, effectively blocks humidity, and enhances shine for truly sleek locks. Its key ingredient, PolyfluoroEster, creates an invisible shield on the hair to lock in moisture-proof smoothness and repel dirt and oil, so you can go longer between washes to break the frizz and damage cycle. Developed for all hair types, sulphate- and silicone-free No Frizz Conditioner works best in conjunction with No Frizz Shampoo and stylers. For optimal results, treat your hair to the complete regimen the longer you use the system, the more resistant the hair is to frizz-causing humidity. Living Proof No Frizz Conditioner is an Allure Best of Beauty Award Winner.Important Information Directions After using PhD Shampoo, apply PhD Conditioner to clean, wet hair. Spread evenly throughout hair. Rinse. Style with PhD 5-in-1 Styling Treatment.