Schwarzkopf Igora Zero AMM is a permanent hair coloration that offers individuals a way to achieve a change in hair color without the presence of ammonia, eliminating the common odor associated with hair coloring for a more comfortable experience. This hair dye ensures optimal coverage, boasting the ability to cover up to 100% white hair, offering a uniform and consistent color from root to tip. At the same time, this product enhances the highlight color performance.