Olaplex No.4P Blonde Enhancer Toning Shampoo in the salon-size 33.8 oz (1 liter) bottle is a highly concentrated purple shampoo that cleanses, tones, and brightens blonde, lightened, and grey hair. Violet pigments neutralize unwanted brassiness and yellow tones while the sulfate-free formula gently removes buildup without stripping.

Powered by patented OLAPLEX Bond Building Technology, it repairs broken disulfide bonds with every wash, leaving color-treated hair stronger, softer, and visibly brighter. The liter size with pump is perfect for dedicated blondes and salon use.

• Salon-size 33.8 fl oz / 1000 mL bottle with pump
• Neutralizes brassiness and boosts brightness in blonde, lightened, and grey hair
• Patented bond-building technology repairs damage as it cleanses
• Sulfate-free (SLS/SLES-free), vegan, and color-safe
• Hydrates while it tones for softer, shinier results