ABOUT Nº.4P
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
 
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.