• 3-in-1 Black Hair Dye Shampoo: our hair dye is different from traditional hair dye, free of parabens and harsh chemicals. Dark brown/black hair dye, it can be used not only as a color hair dye but also as a shampoo and hair conditioner. Very convenient for doing black hair dye at home. • Easy to use: no bowl or brush required, just put on gloves and use it just like regular shampoo, wait only 15 - 20 minutes (for full coverage of gray hair, leave it for 20 minutes), our hair dye shampoo for women and men will cover all your gray hair. It does not stain your skin.