Go big with your best blonde. Stay stocked on No.4P with this convenient liter size with a pump. This highly concentrated, customizable toning shampoo neutralizes brassy hair and unwanted yellow tones while keeping hair hydrated from roots to ends. The sulfate-free formula creates a rich lather that boosts brightness after one use for all blonde, lightened, and grey hair. Featuring patented OLAPLEX Bond Building Technology™. Natural or stylist-created, root-to-tip or balayage, No.4P proves bright blondes can be healthy and strong too. 

SCIENTIFICALLY PROVEN to leave hair 3x brighter*

*Compared to 3 of the top US purple shampoos in premium retail & salon, 2022