Just For Men® Shampoo-In Hair Color is the traditional way to target your greys. BENEFITS: Targets only greys for a natural look. 5 Minute Easy Application. Lasts up to 6 weeks. No-Drip Formula. Just apply where hair is most grey and lather in like shampoo. Fortified with Vitamin-Enriched Conditioners for thicker, healthier-looking hair that is easy to control. Gentle, ammonia-free product that leaves hair feeling good. Quality Made in the USA.