Olaplex No. 4 Shampoo is a moisturizing and repairing shampoo, specially designed to restore the health and condition of hair. It has a unique formula that deeply moisturizes hair, helping to reduce frizz and enhance shine. Suitable for all hair types, including color-treated and chemically treated hair. Works to repair damaged hair bonds, restoring strength and elasticity to hair. Benefits: Deeply moisturizes hair. Enhances hair shine. Reduces frizz. Helps repair damaged hair bonds. Sulfate and phosphate free. How to use: Recommended for use as part of the Olaplex hair care system. Apply a suitable amount to wet hair, then gently massage until a lather forms. Rinse well and repeat if necessary