Unbreakable Blondes.Olaplex No.4P Blonde Enhancer Toning Shampoo is a highly concentrated purple shampoo that cleanses, tones, and repairs while keeping hair hydrated from roots to ends. Sulphate-free formula creates a rich lather to neutralize brassiness and boost brightness after one use for all blonde, lightened, and grey hair. For all blonde, lightened, and grey hair.BENEFITSSuitable for all hair typesVegan and Cruelty freeGluten and nut freeSulphate, Phthalate and Paraben freePH BalancedPhosphate FreeDIRECTIONSApply to wet hair, lather fully, and let process. To be used 2-3 times per week or as often as needed to neutralize unwanted brassiness.