MEIDU Hair Color Shampoo contains natural ingredients to make your hair silky and shiny ,which can reverse gray hair and cover gray hair 100% effectively. Ammonia free,and paraben free with no harsh chemical. MEIDU 3 in 1 hair dye shampoo can be used not only as hair dye but also as hair shampoo and hair conditioner, which invigorates your scalp, fortifies hair from root to tip and maintains overall vigor for your hair. More than 30 days long lasting for natural hair color, save money and time for you.