TOPPIK HAIR BUILDING FIBERSToppik Hair Building Fibers blend seamlessly with your natural hair because they are keratin proteinthe same type of protein in natural hair! Toppik fibers blend undectably with your existing hair, making it look full and thick instantly. Good for building hair volume or to fix your receding or uneven hairline. Resists wind, rain and sweat. Washes out with one shampoo. Clings to the smallest hairs. 12g 0. 42oz.