Just For Men Mustache and Beard Dye Gel Stain Dark Brown 30 Cc. FUNCTION Coloring gel formulated for difficult gray coloring. Conforms to its natural color tones. WARNINGS Some people may have an allergic reaction to the dyes. An allergy test is recommended prior to application. If you have problems with skin depigmentation (vitiligo) or a family history of vitiligo, do not use. An allergic reaction or skin irritation may cause loss of skin pigmentation.