HAIR BUILDING FIBERS DARK BROWN. Benefits: Dark Brown color. Safe, natural, and undetectable way to improve the appearance of thinning hair without harmful drugs, chemicals, or surgery. Made from pure organic Keratin Protein; the same protein found in human hair. Electro-statically charged to form a magnetic attraction with your existing hair - however thin - and blend perfectly to conceal the appearance of thinning and balding in seconds. Secure bond stays put all day (and night) even in rain, wind, and perspiration. It won't come off until you wash it out. : :