Product comes in 11 shades, so its easy to find one that matches your natural hair color. Product targets only the gray hair and replaces it with subtle tones that match your natural hair color. No-drip formula works in 5 easy minutes. Leaves hair thicker and fuller-looking. Formula wont damage hair. Lasts until the gray grows back. Gray target technology. Rejuvenates hair. Vitamin-enriched. Ammonia-free. Lasts up to six weeks.