Olaplex No.9 Bond Protector Nourishing Hair Serum is an antioxidant-rich protective treatment suitable for all hair types. This innovative serum utilizes bond-building technology to shield hair from damage while improving manageability and providing deep nourishment. Key features: • Antioxidant-rich formula • Protects hair from damage • Improves hair manageability • Suitable for all hair types • Bond-building technology • Lightweight formula • 90ml/3.0 fl oz size This serum can be applied to both damp or dry hair for ongoing protection throughout the day. The lightweight formula works to soften and smooth hair while providing essential nourishment through Olaplex's patented bond-building technology. For best results, apply a small amount to clean, towel-dried hair before styling.