JUST FOR MEN Targets only gray for a natural look Looks Natural Just For Men targets only the gray hair. Replaces it with subtle tones that match your natural hair color. Easy As Shampooing No-drip formula works in 5 easy minutes. Rejuvenates Hair Vitamin-enriched. Leaves hair thicker and fuller-looking. Ammonia-free formula won't damage hair. Lasts Up To Six Weeks Lasts until the gray grows back.