Toppik Hair Building Fibers are microfibers designed to instantly make hair look thicker and fuller. These keratin-based fibers electrostatically cling to existing hair strands, effectively concealing the appearance of thinning areas and regrowth. Available in nine shades, these fibers blend naturally with your current hair color, providing immediate cosmetic enhancement for both men and women seeking denser-looking hair. Application is simple and the effect is natural, offering a temporary solution for enhanced hair density.