Olaplex Nº.4P Blonde Enhancer Toning Shampoo New in Bottle 8.5 oz Unbreakable Blondes Highly concentrated purple shampoo cleanses, tones, and repairs while keeping hair hydrated from roots to ends. Sulfate-free formula creates a rich lather to neutralize brassiness and boost brightness after one use for all blonde, lightened, and grey hair. Scientifically Proven: 3x Brighter* *Compared to top purple shampoos