This is an Anti-Yellowing Shampoo from Philip Martin's, designed to neutralize unwanted warm tones in blonde, grey, or highlighted hair. It works to refresh and maintain the desired cool shade, providing gentle cleansing action while infusing the hair with corrective pigments. Regular use helps keep your color vibrant and pristine by combating brassiness. Ideal for use in the hair care routine for maintaining cool-toned hair color.