100% GRAY HAIR COVERAGE: Can effectively cover gray hair, so that you are no longer affected by gray hair and rejuvenate. Obtain back the fresh-looking hair of your younger days. Black hair can last 3-4 weeks. The hair coloring shampoo only hang on to the surface of the hair shell, It's safer for your hair as well as your skin. (Warm Note): Take a skin test before first using. MUST READ: If you receive the wrong color after ordering, please feel free to contact us and we will replace it immediately for you. Our customer service will handle the problem for you within 12 hours. 3 IN 1 BLACK HAIR DYE: Different from traditional hair dye, our hair dye shampoo is parabens free, no harsh chemicals. The product can be used not only as a black hair dye but also as a hair shampoo and hair conditioner. EASY TO USE: Requiring no bowl or brush, just need to put on gloves, and use it the same as normal shampoo, wait for only 15 - 20 minutes(For full coverage of grey hair stay time 20 minutes), Our hair dye shampoo for women and men will cover all your grays! Doesn't stain your skin. MILD HERBAL FORMULA INGREDIENT: Natural plant formula, Polygonum multiflorum can treat the hair, strengthen the hair roots, make the hair strong and soft. Ginseng extract nourish the hair silk, make the hair dark and shiny. Natural black hair lasts for more than 3 weeks. Doesn't damage hair SAVE TIME & MONEY: Stop spending a lot of time and money going to the salon. Now you can use our color shampoo from the comfort of your home and get great color results in just a fraction of the time. Save a lot of time and money.