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 ThickHair Texture:Coily, Curly, Straight, and WavyHair Concerns:- Frizz- Dryness- Damage, Split Ends, and BreakageKey Benefits: - Reduces breakage and split ends- Visibly strengthens hair- Restores healthy appearance and textureHighlighted 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.