Olaplex No.4P Blonde Enhancer Toning Shampoo - highly concentrated purple shampoo cleanses, tones, and repairs while keeping hair hydrated from roots to ends. The sulfate-free formula creates a rich lather to neutralize brassiness and boost brightness after one use for all blonde, lightened, and grey hair.
Apply to wet hair. Lather fully and let process 1-3 minutes. Rinse. For more intense toning, leave on for up to 5 minutes. TIP: Remove any buildup with No.4 Bond Maintenance Shampoo prior to using No.4P.