Olaplex No 4P Blonde Enhancer Toning Shampoo
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.
Where: Apply to wet hair, lather fully, and let process.
When: 2-3 times per week or as often as needed to neutralize unwanted brassiness.
For: All blonde, lightened, and grey hair.