Olaplex Bond Maintenance Shampoo No.4 8.5oz is a highly nourishing and reparative shampoo designed to gently cleanse while restoring strength, moisture, and shine to all hair types. Formulated with patented OLAPLEX Bond Building Technology™, it helps repair broken bonds, reduce frizz, and protect hair from everyday damage. Safe for color-treated hair, this sulfate-free formula supports healthy hair structure, leaving it soft, manageable, and visibly healthier with every wash.