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 & brightening the appearance of hair. Enriched with the brand’s original Bond-Builder System, the formula works to transform dry, brittle areas into a soft, visibly shiny finish. It helps to enhance manageability, while delivering an illuminating effect. Saturated with highly-concentrated pigments, the best-selling violet shampoo means that you can choose your toning level: the longer you treat, the brighter the results. Suitable for all-over colour, balayage or natural blonde styles.