Yardlie Professional Black Hair Dye Shampoo is a hair coloring product designed to provide a rich, dark black color while also nourishing the hair. It works by combining the dyeing process with a shampoo formula, allowing users to easily apply the product during their regular hair-washing routine The Default tone of the shampoo ensures an even application, resulting in a natural-looking finish. This product is ideal for those looking to cover grays or enhance their dark hair without the hassle of traditional dyeing methods. Simply massage it into wet hair, leave it on for a few minutes, and rinse for vibrant, long-lasting color.