Olaplex No.4P Enhancer Toning Shampoo is a colour-refining shampoo designed to maintain and enhance blonde, silver, and highlighted hair tones while repairing and strengthening strands. Infused with Olaplex’s patented bond-building technology, it helps neutralise unwanted yellow or brassy undertones, leaving hair cooler, brighter, and more luminous. This gentle, hydrating formula cleanses effectively without stripping moisture, providing vibrant, healthy-looking hair that feels soft and manageable. The shampoo works to repair broken bonds, smooth frizz, and improve elasticity while extending the life of colour-treated hair. Ideal for blondes and silver tones, it nourishes and strengthens hair, leaving it silky, shiny, and full of movement.