Discover a cutting-edge toning system with the Olaplex No. 4-P Blonde Enhancer Toning Shampoo. The sulphate-free shampoo offers customisable blonde maintenance, helping to neutralise brassy tones while intensely moisturising and brightening your hair. Enriched with the brand’s original Bond-Builder System, the formula works to transform dry, brittle areas into soft, shiny and resilient strands. It helps to lend strength and manageability, all while illuminating your blonde. Saturated with highly-concentrated pigments, the 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.