Men's Máster colouring shampoo for men, a hair product to cover 100% of grey hair, dyes hair in 5 minutes and lasts up to 4 weeks. It also nourishes and restores hair with cannabis oil. Hemp oil is a natural product derived from the oleaginous hemp plant, also known by its Latin name cannabis. It prevents drying of the hair and scalp by coating the hair in a protective layer that keeps it from losing moisture. It is especially suitable for summer. In addition, it makes frazzled hair come alive and shine.