Infused with patented OLAPLEX's Bond Building Technology, this customisable toning shampoo strengthens, softens, and neutralises unwanted yellow tones for brighter, more manageable hair. By combining a high concentration of pigment, with the brand's patented technology and conditioning benefits, this just became your new go-to purple shampoo. Use after No 3 weekly treatment and follow with the No 5 Bond Maintenance Conditioner.