A pre-shampoo hair treatment that reduces breakage and split ends for visibly stronger hair. Formulated with scientifically proven OLAPLEX Bond Building Technology™ to repair broken disulfide bonds caused by heat, chemical, and mechanical damage. The #1 Prestige Haircare Product. * A pre-shampoo hair treatment to repair damaged hair. Patented OLAPLEX Bond Building Technology™ is proven to rebuild weak and broken disulfide bonds for visibly healthier, stronger hair and reduce breakage and split ends. Key Benefits: Reduces breakage and split ends Visibly strengthens hair Restores healthy appearance and texture Key Ingredients: Bis-Aminopropyl Diglycol Dimaleate - Patented and proven technology to repair broken bonds for stronger hair. *Source: The NPD Group/U. S. Prestige Beauty Total Measured Market, Hair Care Sales, Annual 2021 | Olaplex No. 3 Hair Perfector, 3. 3 fl. oz | Dermstore