Olaplex No.0,2,3,4, 5,6,7 Bond Maintenance Olaplex No.4 Bond Maintenance Shampoo 250ml formulated with OLAPLEX Bond Building Chemistry. improves hair structure gives hair incredible shine and strength provides perfect hydration makes it easy to handle. for everyday use and all hair types Free from sulfates, parabens, gluten and nuts. Color safe and 100% vegan.