A highly moisturising, reparative shampoo that leaves hair easy to manage, shiny and healthier with each use. N?4 is colour-safe, sulphate-free, and proven to reduce breakage and strengthen all types of hair. Key benefits: - Repairs and maintains bonds within the hair - Eliminates frizz and flyaways - Reduces breakage PH Balance: 6-6.5 PRO TIP: A little goes a long way! Start with a coin size squeeze and work your way up if needed. To use: Apply and massage the product throughout the hair. Rinse product from hair. Follow with Olaplex N?5 Bond Maintenance Conditioner (sold separately). Where: Concentrate on roots. When: Formulated for daily or every wash use. For: All hair types, especially those needing clarifying or oil control. OLAPLEX products are thoroughly tested in-house and by independent third-party laboratories for safety and efficacy. This product testing includes the industry standard Human Repeat Insult Patch Test (HRIPT), which tests for skin irritation or sensitivity. All