Brand from United States: OLAPLEX. 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. Strengthens, softens, and neutralises unwanted yellow tones Bring your blonde back to life with this highly hydrating and brightening formula; the longer you treat, the brighter the results. Powered by Olaplex's patented Bond Building technology, it helps restores strength by rebuilding the broken bonds in the hair, caused by bleaching and colouring the hair. For all blonde, lightened and grey hair. Benefits Strengthens the hair Tones hair to reveal a cool blonde Deeply hydrates Brightens and adds shine Paraben, Phosphate & Sulfate Free Vegan, Cruelty Free formula How to use Apply to wet hair Lather fully & let process 1-3 minutes Rinse For more intense toning, leave on up to 5 minutes Follow with Olaplex N5 Bond Maintenance Conditioner