Matrix Color Obsessed So Silver Neutralizing Shampoo1LShowcase your most beautiful blonde colour with Matrix Total Results So Silver Shampoo. This professional clarifying shampoo cleanses and neutralises unwanted brassy warmth, illuminates blonde highlights, and eliminates dull, yellow tones in just 1 wash*. So Silver Shampoo is ideal for both colour treated and natural hair ranging from grey to white shades; for best results, use 1 2 times a week in place of your regular shampoo.