Seamlessly eliminate grey hair and reclaim your natural look with Just For Men Shampoo-In Haircolour in Shade H-55 Real Black. This fast-acting formula targets only grey hairs, blending them away with precision to match your original tone. Infused with a triple-nourishing blend of Keratin, Olive Oil, and Vitamin E, it strengthens hair strands while delivering an easy, drip-free application. Results take just 5 minutes and last up to 8 weeks until your greys grow back.