Olaplex No.4P Blonde Enhancer Toning Shampoo is a specialized purple shampoo that repairs, hydrates and brightens blonde, lightened and grey hair. This professional formula uses patented bond-building technology to strengthen hair while neutralizing brassy tones for enhanced color maintenance. Key features: • Repairs and strengthens damaged hair bonds • Hydrates and nourishes hair • Neutralizes brassy tones • Brightens blonde, lightened and grey hair • Contains patented bond-building technology • Purple-tinted toning formula • 250ml/8.5 fl. oz size This professional toning shampoo combines Olaplex's signature bond-building technology with purple pigments to maintain and enhance blonde hair color. The formula is suitable for all types of blonde, lightened and grey hair. For best results, use regularly as part of your hair care routine to keep blonde tones bright and brass-free while benefiting from Olaplex's repairing properties.