This Olaplex shampoo is formulated with Olaplex's bond-building ingredient. With an incredibly concentrated formula, it works together with the Olaplex No.5 Bond Maintenance Conditioner, and Olaplex 3 to help restore internal strength and moisture levels. Your hair is left feeling softer, with a shinier, healthier looking finish. Designed to improve the manageability of all hair types. features and benefits of the Olaplex No.4 Bond Maintenance Shampoo? Repairing shampoo for all hair types Ideal for environmentally damaged, heat damaged or colour-treated hair Hydrating and nourishing formula Concentrated formulation Includes Olaplex bond building chemistry to improve internal strength Not tested on animals Improves shine and manageability Does not strip hair of moisture Volumising effect Sulfate free Paraben free Vegan Colour safe