The Just For Men Shampoo-In Color silver hair dye is permanent for a natural gray-free look. The hair color covers your grays completely, permanently and effectively. It targets only the gray hair and preserves subtle variations of your natural hair color. This easy-to-apply permanent gray hair color only takes five minutes to color every single gray hair, and lasts until the gray grows back. With a long-lasting formula. Just For Men Shampoo-In Color contains protein, Vitamin E, aloe and chamomile that nourishes your hair while you color. It leaves your hair looking healthier and thicker after every application. The hair restorer's ammonia-free formula causes no damage to your hair. It conditions your hair and leaves it smoother and easier to manage.