Just for Men Shampoo-In Hair Color with a unique complex of Vitamin E, protein, chamomile and aloe for thicker. Mix the formula and shampoo it in. Leaves hair feeling good. Targets only gray for a natural look that works in 5 easy minutes. It leaves hair thicker and fuller-looking. Lasts until the gray grows back. Ammonia-free formula works in 5 easy minutes. Vitamin-enriched. Leaves hair thicker and fuller-looking. Ammonia-free formula won't damage hair. Just For Men targets only the gray hair. Replaces it with subtle tones that match your own natural hair color.