Thicker Looking Hair in Seconds Viviscal Hair Filler Fibers contain microscopic, electrostatically charged fibers which stick to hair and create a volumizing appearance for both men and women. They instantly make thinning hair look thicker and fuller. They are available in natural looking hair colors to suit everyone. If necessary, can mix more than one color to tailor them to your hair color. Viviscal Hair Filler Fibers instantly volumize the appearance of your hair. They are easy to apply; just tap it on for instant coverage. They last in wind and rain but wash out easily with shampoo. Work with all hair types and are for both men and women.