The Olaplex Bond Maintenance No.4C Clarifying Shampoo is designed for a deep, yet gentle cleanse. It effectively removes heavy build-up of minerals, chlorine, hard water residues, chlorine, and spent styling products that can dull hair and impede performance of other treatments. This clarifying formula rebalances the hair and scalp while strengthening bonds with Olaplex's patented technology. Use this professional-grade shampoo weekly or as needed to restore hair's clarity, softness, and shine.