Discover a cutting-edge toning system with the Olaplex No.4P Blonde Enhancer Toning Shampoo. The shampoo offers customisable blonde maintenance, helping to neutralise brassy tones while intensely moisturising and brightening the appearance of hair in just one use. Enriched with patented Olaplex Bond Building Technology, the formula works to transform dry, brittle strands into a soft, visibly shiny finish. , , It helps to enhance manageability, while delivering an illuminating effect. Saturated with highly-concentrated pigments, the best-selling purple shampoo allows you to choose your toning level: the longer you treat, the brighter the results. Suitable for all-over colour, balayage or natural blonde styles. , , How To Use: Application: Apply to wet hair, distributing evenly. Lather fully and leave on 1-3 minutes. Rinse. For more intense toning, leave on hair for up to 5 minutes. , , Routine: Follow with No.5 Bond Maintenance Conditioner or No.8 Bond Intense Moisture Mask for extra moisture.