Olaplex No.9 Bond Protector Nourishing Hair Serum is an antioxidant-rich treatment designed to protect and nourish all hair types. This innovative serum utilizes bond-building technology to improve manageability, smooth hair, and shield strands from environmental damage. Key features: • Antioxidant-rich formula • Protects hair from damage • Improves manageability • Suitable for all hair types • Bond-building technology • Smooths and softens hair This 90ml/3.0 fl. oz serum can be applied to both damp or dry hair for ongoing protection throughout the day. The lightweight formula is part of the Olaplex hair care system, utilizing their patented technology to maintain and repair hair bonds while providing nourishing benefits. For best results, apply a small amount to clean, towel-dried hair before styling.