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 dye shampoo can last 3-4 weeks. The hair dye shampoo only hang on to the surface of the hair shell, It's safer for your hair as well as your skin. PLEASANT COLOR PROTECTION AND HAIR DAZZLE: Restore youthful looking hair with added shine, our instant hair colormaking the hair extra soft. This hair color shampoo is formulated to help you get the hair color you love! 3 in 1 Hair Dye Shampoo: It can be used as hair black hair dye, hair conditioner and black hair shampoo. Very convenient to make hair dye black at home and save our precious time from salon visiting. EASY TO USE: Requiring no brush, just need to put on gloves, keep hair dry and use it the same as normal color shampoo, wait for only 10-15 minutes, Our black shampoo for women and men will cover all your grays! Doesn't stain your skin. NOTE: Skin test before using. LONG-LASTING: Our hair color shampoo provides long-lasting results, maintaining color up for 4 weeks with each use. To keep your hair shiny and black for longer, we recommend using this product every 15 days. Enjoy the convenience of maintaining the color you want without frequent trips to the salon.