Olaplex No.4 Bond Maintenance Shampoo is formulated with OLAPLEX Bond Building chemistry to restore internal strength and moisture levels to hair. The no. 4 treatment from Olaplex re-links broken bonds and reduces breakage in hair while strengthening each individual strand. This reparative shampoo adds incredible shine and manageability to all hair types and is color-safe. Use Olaplex no 4 bond maintenance shampoo to protect your precious hair from everyday stresses.