OLAPLEX No.4 Bond Maintenance Shampoo is a hair care product designed to clean and strengthen hair. Formulated with patented bond-building technology, this shampoo works to re-link broken disulfide bonds within the hair structure, enhancing resistance to damage. The gentle formula cleanses hair without stripping away natural oils, making it suitable for all hair types, including dry and color-treated hair. Regular use helps reduce frizz, flyaways, and split ends while improving manageability, shine, and softness. This vegan product is free from harsh chemicals and is designed to maintain the results of previous OLAPLEX treatments. To use, apply to damp hair, massage into the scalp and hair, and rinse thoroughly. For optimal results, it is recommended to follow with OLAPLEX No.5 Bond Maintenance Conditioner and incorporate other products from the OLAPLEX range into your routine.