Matrix Total Results Color Care So Silver Shampoo brightens and neutralises unwanted yellow tones on grey and white hair. With a specially selected blend of ingredients, this cleanser works to neutralize unwanted brassy tones in hair whilst enhancing natural highlights. Hair is left bright, beautiful, and radiant with no yellow tones.How to Use: Wearing suitable gloves, apply Matrix Total Results Color Care So Silver Shampoo to wet hair, lather, and rinse well. Repeat if necessary. For maximum benefits, leave the second lather for 3 to 5 minutes.Do not use if:- You have already had a reaction to a hair colorant.- You have a sensitive, itchy, or damaged scalp.A skin allergy-tested must be done 24 hours before application.