This REF Cool Silver Shampoo is formulated with plant extracts and specialized blue and violet pigments to effectively counteract unwanted yellow or brassy tones in hair, particularly beneficial for sun-bleached or sun-damaged hair that needs toning. Its sulfate-free formula ensures gentle cleansing while depositing necessary toning agents, helping to maintain cool, sophisticated blonde, gray, or silver shades. Ideal for regular maintenance to keep color vibrant and neutralized between salon visits.