Just For Men Color Hair H-55 Real Black is a permanent hair dye designed for men to cover gray hair with a natural-looking real black shade (H-55). It provides full gray coverage, blends seamlessly with existing hair, and comes in an easy-to-use formula (brush or comb-in). The product typically includes a color base and developer cream, along with conditioning agents to nourish hair. Results last up to 6 weeks.