TOPPIK Hair Building Fibers are tiny, dark fibers perfectly designed to interlink with your existing hair, instantly making it look thicker and fuller. Made from keratin protein—the same protein that makes up real hair—these fibers are statically charged to cling to your hair shaft, effectively concealing the appearance of thinning areas and addressing noticeable hair loss. These fibers offer a natural-looking solution for both men and women. They are easy to apply directly onto thinning spots and remain securely in place until the next time you wash your hair. Ideal for building confidence through the immediate improvement of overall hair density and coverage.