A multi-benefit healthy hair serum, powered by OLAPLEX technology. OLAPLEX No.9 Bond Protector Nourishing Hair Serum is a silicone-free, weightless, antioxidant-rich serum that enhances any hair routine to protect u0026 perfect all hair types and textures.Pollution damages our hair every day, leaving it dull, lifeless, difficult to style and ultimately resulting in broken bonds. No.9 is packed with antioxidants to neutralise free radicals, act as a shield against pollution, guard the hair from breakage and protect against heat styling.Key benefits:- Satin shine u0026 softness- Style memory u0026 bounce back curls- Anti-tangle u0026 anti-staticTo use: Apply a small amount to damp hair working upward from end to roots. Use more as needed for longer, thicker hair. Air-dry for a soft texture. Blow-dry for a smooth finish. Diffuse for waves or curls. Apply sparingly to dry hair for frizz and static control and added shine.Where: As the first step in your styling routine, apply a small amount to damp hair working upward from ends to roots. Use more as needed for longer, thicker hair.When: Use on days you wash your hair and any days in between for added protection.For: All hair types and textures.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 OLAPLEX products have passed the HRIPT, meaning the products show no signs of causing irritation, inflammation, or sensitivity.