Clairol Professional Shimmer Lights Shampoo (blonde & silver) is a color-enhancing shampoo that brightens & refreshes blonde, highlighted, and silver hair. Clairol Professional Shimmer Lights Color-Enhancing Shampoo is a protein-enriched conditioning formula that can do the following:Tones down brassiness on blonde / gray hair.Renews & refreshes faded highlights and ash-toned hari.Removes dull yellow in gray / white hair. Leaves hair shiny without residue.Directions: Wet hair. Lather, rinse, and repeat. For extra brightening & color, leave second lather on 3-5 minutes. No patch test required.Shimmer Lights by Clairol Professional shampoo and color-enhancing conditioner are specialized haircare products for white, gray, decolorized and toned, highlighted and light blonde tinted hair. The shampoo is a gentle, non-alkaline, protein-enriched formula that neutralizes and tones down yellow.