Founded in 2014 by Dean Christal, OLAPLEX has changed the landscape of the hair care industry. After employing two chemists to find a chemical that wouldn't damage dyed tresses, the team formulated the brand's proprietary, patented Bond Building Technology. Utilising this complex is the No.4P Blonde Enhancer Toning Shampoo (250ml), a purple-toned cleanser that helps to neutralise brassy tones while intensely moisturising and brightening tresses.Description:Is your blonde looking a little brassy? There's no need to fret when OLAPLEX's No.4P Blonde Enhancer Toning Shampoo can come to the rescue.This ultra-concentrated purple shampoo reduces breakage and hydrates as it cleanses and tones from roots to ends. Use N°.4P to neutralize brassy hair and yellow tones for brighter, softer, stronger blond hair, gray hair, or highlighted hair. Effective on natural and color-treated hair.Powered by a cutting-edge toning system, this cleanser offers customisable blonde maintenance. Brimming with highly concentrated pigments, it lets you choose your toning level: the longer you treat, the brighter the results. It's suitable for all-over colour, balayage or natural blonde styles too. If that wasn't enough, this purple shampoo is also enriched with brand's patented Bond Building Technology, which works to transform dry, brittle strands into a soft, visibly shiny finish. No orange hues here...Key Benefits:Neutralizes brassiness for brighter hairStrengthens hair and repairs damageBrightens and enhances the tone of blonde hair, neutralizing the tan tone and providing shine. In addition, it is moisturizing and repairing, creating a rich lather without sulfates.Hydrates and softens hairTip:If hair has product build-up, cleanse first with Olaplex N°4 Bond Maintenance Shampoo.