What it is: A pre-shampoo hair treatment that reduces breakage and split ends for visibly healthier hair. OLAPLEX Bond Building Technology™ is proven to relink broken disulfide bonds damaged by chemical services, heat, and styling. Hair Type: Fine, Medium, and Thick Hair Texture:Coily, Curly, Straight, and Wavy Hair Concerns:- Frizz- Dryness- Damage, Split Ends, and Breakage Key Benefits: - Reduces breakage and split ends- Visibly strengthens hair- Restores healthy appearance and texture Highlighted Ingredients:- Bis-Aminopropyl Diglycol Dimaleate: Patented and proven technology to help repair broken bonds for stronger hair. Ingredient Callouts: It is also vegan and cruelty-free. No.3 Hair Perfector is now formulated without Lilial. What Else You Need to Know: This deeply reparative, at-home bond-building treatment for damaged hair is formulated with patented OLAPLEX Bond Building Technology™. It helps to rebuild weak and broken disulfide bonds for visibly healthier, stronger hair and to reduce breakage and split ends. OLAPLEX products are thoroughly tested in accordance with industry standards in-house and by independent third-party laboratories for safety and efficacy.