[100% Gray Hair Coverage] Say Goodbye to Gray Hair, our black hair dye shampoo covers 100% of gray hair, no more gray hair and rejuvenation. Our formulas are specially designed to help you dye your hair the perfect color. [Easy to Use] Our easy to use hair color shampoo is simpler and quicker than traditional hair coloring methods, no need for bowls or combs, it can be used like a regular shampoo without worrying about making a mess. (Recommended when hair is dry) [Affordable] You don't need to spend a fortune or waste time to get salon-quality results at home. Our 500ml bottle of hair color lasts for about 10 applications and the color stays on for up to 3-4 weeks Read Less