-With ultra-precision technology that achieves pure and balanced color results, with natural depth and shine. -Up to 100% gray coverage. -Formulated with ME+ to reduce the risk of developing a new allergy to hair dye1. -Formulated with metal purifier, which helps prevent hair damage caused by metals. Your best ally to obtain ultra-precise results and keep hair healthy color after color. With Koleston Perfect it is not necessary to use a pre-treatment to neutralize metals. -Dermatologically tested2 -Vegan3 -Global commitment to no animal testing4 Up to 85%5 ingredients of natural origin6 HOW TO USE:<,strong> Simple 1:1 mixing ratio Up to 5 rinse levels