What makes healthy hair dull, faded, dry, unmanageable, or oily? The buildup of impurities. No. 4C Bond Maintenance® optimizes your hairs repair results by removing the impurities that damage it. Harsh clarifying shampoos can leave hair feeling dry, which is why No. 4C is sulfate-free and pH-balanced to keep hair moisturized. The buildup of impurities from water, hair products, and even the environment can look like signs of damage. If left on the hair, they can lead to real damage such as split ends, breakage, and frizz. No. 4C Bond Maintenance® Clarifying Shampoo is formulated with a Broad Spectrum Clarifying System to remove product buildup, excess oil, hard water minerals, chlorine, even heavy metals, and contaminants—all without causing dryness. Featuring a Broad Spectrum Clarifying System and scientifically proven OLAPLEX Bond Building Technology™. How to use: Apply to damp hair, focusing on the roots and massaging gently through to the ends. Complete the treatment with a moisturizer suitable for your hair. Suitable for frequent use on all hair types and textures.