Introducing The Olaplex No. 9 Bond Defender, A Serum Designed To Nourish Your Hair. This Innovative Product Leverages The Proprietary Olaplex® Bond-building Technology, Resulting In A Versatile Treatment That Promotes Healthier Hair. The No. 9 Bond Defender Is A Lightweight Serum, Free From Silicones, Infused With Red Algae Extract, Which Is Packed With Antioxidants To Enhance Your Hair Care Routine And Safeguard All Hair Types.Why It's Essential: Everyday Exposure To Pollution Can Leave Your Hair Looking Lackluster, Hard To Manage, And Prone To Breakage. This Is Where No. 9 Comes In—formulated With Antioxidants, It Neutralizes Free Radicals And Acts As A Protective Barrier Against Environmental Stressors And Heat From Styling Tools.What Sets It Apart: The Unique Formulation Of No. 9 Provides Multiple Benefits, Delivering Immediate Visible Results While Simultaneously Protecting Your Hair. It Serves As A Thermal Protector Effective Up To 232ºc, Providing A Satin-like Shine And A Soft Feel. Additionally, It Controls Frizz And Static, Aids In Detangling, Accelerates Blow-drying, And Helps Maintain The Shape Of Curls And Waves By Supporting Hair Recovery.