By completing the color process while shampooing and conditioning your hair, you can easily have naturally shiny, dark hair with renewed charm.Long-lasting color-fixing: Adopting advanced color-fixing technology, the dyed hair color is long-lasting and not easy to fade. Whether you are doing daily washing or outdoor activities, you can keep your hair dark and shiny, lasting as new. Economical: Compared to buying shampoo, conditioner and hair color separately, this product combines all three into one, greatly reducing your purchase cost. Meanwhile, due to its efficient hair color effect, it reduces the need for frequent hair color and further saves you money. Simple operation: no need to mix, ready to use, just follow the instructions in a few simple steps, you can easily complete the process of hair color, even for the first time you can easily get started. Three-in-one design: integrating three functions of shampooing, conditioning and color, simplifying the process of hair color, allowing you to enjoy the fun of shampooing while completing the color of your hair without the need to worry about cumbersome steps. Natural Transition: Unique color blending technology ensures natural uniformity of hair color after dyeing, seamlessly connecting with the original black hair, avoiding the embarrassment of color difference, allowing you to confidently show your natural beauty. Efficient Coverage: This product is specially designed to cover gray hair, using a high concentration of black hair color factors, can penetrate deep into the hair strands, effectively cover gray hair, whether it is a few sporadic or large areas of gray hair, can be easily dealt with, so that you can instantly regain the dark hair of your youth.