Rebuild and deeply nourish damaged strands with the Olaplex No. 4 Bond Maintenance Shampoo. Specially formulated to restore structural integrity to hair compromised by heat, chemical treatments, or daily styling, this daily reparative shampoo gently cleanses while actively repairing broken bonds. Powered by Olaplex’s patented Bond Building Technology, its ultra-concentrated formula creates a rich, luxurious lather that hydrates, smooths, and strengthens hair from root to tip. Suitable for all hair types and color-treated locks, it leaves your hair noticeably softer, glossier, and more resilient after every wash. Key Benefits: Patented Bond Repair - Reconnects broken disulfate bonds from within to restore internal strength, elasticity, and resilience. Gentle, Moisture-Rich Cleanse - Color-safe, sulfate-free formula purifies the scalp and hair without stripping essential moisture. Frizz & Flyaway Control - Smooths the hair cuticle to eliminate stubborn frizz and improve overall manageability. Luminous Softness & Shine - Leaves all hair textures visibly healthier, softer, and infused with brilliant, long-lasting gloss.