Olaplex No. 4P Enhancer Toning Shampoo 1000ml Designed to neutralise unwanted warm and brassy tones, Olaplex No. 4P Enhancer Toning Shampoo is ideal for women with blonde, silver, grey or highlighted hair. Use regularly to refresh cool, neutral colour between salon visits or as part of a colour-care routine to maintain luminous, salon-fresh results. This professional-strength, salon-size 1000ml bottle delivers gentle yet effective toning. The formula deposits violet pigments to counteract yellow and brassy undertones while cleansing and helping to smooth the hair fibre. It works to enhance brightness and manageability without leaving hair feeling heavy, making it suitable for frequent use on colour-treated hair. The composition combines Olaplexs patented bond-building technology (bis-aminopropyl diglycol dimaleate) with toning violet pigments and conditioning agents to support hair strength and elasticity as it refines tone. The blend is formulated to be safe for colour-treated hair and to help maintain the integrity of chemically processed strands. In conclusion, Olaplex No. 4P Enhancer Toning Shampoo 1000ml is a practical, professional solution for women seeking to keep blonde, silver or highlighted hair cool and vibrant. The large format offers great value for at-home or salon use apply to wet hair, lather, rinse, and leave briefly when extra toning is desired.