Just for men beard and mustache dye dark brown / black (m-45) Patented white target technology is at just for men! With its patented technology that targets only gray hair, you can dye your hair and beard in just 5 minutes to achieve a 100% natural look. Since it does not dye your natural beard and mustache strands, you will get a more natural look with JFM. It makes your beard and mustache look fuller and more natural with the biotin-aloevera and coconut oil it contains.