Just For Men Shampoo-In Hair Color in Darkest Brown (H-50) is a specially formulated hair coloring product for men that offers quick and easy application. This shampoo-based formula contains nourishing ingredients like keratin, olive oil, and vitamin E to maintain hair strength while delivering natural-looking color results. Key features: • Shampoo-in formula for easy application • Contains keratin, olive oil and vitamin E • Restores original color • Provides natural-looking results • Fast and easy to use • Darkest brown shade (H-50) • Includes color base and developer The product comes with a 27.5mL color base and 38.5mL color developer. The formula is designed to target grey hair while conditioning and strengthening hair fibers through its enriched formula with keratin, olive oil and vitamin E. For best results, perform a patch test 48 hours before application and carefully follow all included instructions.