The foolproof way to eliminate all grey while preserving the subtle variations in your hair. Just For Men Autostop Haircolour lets you pinpoint your greys for perfect results everytime. It is easy to use, all you have to do is comb-it in, then shampoo, and it only takes 10 minutes. It is also gentle on hairas it does not consist peroxide and ammonia. The traditional haircolour products contain peroxide and/or ammonia. Just For Men innovation is activated by oxygen in the air.