Just For Men Shampoo-In Color hair color covers your gray roots completely, permanently and effectively. It targets only the gray hair and preserves subtle variations of your natural hair color. This easy-to-apply hair coloring kit only takes five minutes to color every single gray hair, and lasts until the dark silver hair grows back. Just For Men Shampoo-In Color male gray hair color contains protein, Vitamin E, aloe and chamomile that nourishes your hair while you color. The gray root touch-up coloring kit leaves your hair looking healthier and thicker after every application. Its ammonia free formula causes no damage to your hair. It conditions your hair and leaves it smoother and easier to manage. Can't decide between two shades? Try the lighter Just For Men gel first. You can always go darker later.