Toppik Hair Building Fibers 150 Day helps you create fuller-looking hair with ease. The all-natural, color-matched, keratin fibers bond to each hair shaft, delivering a natural, thicker appearance. Its unique water and perspiration-resistant formula locks in place for a comfortable, long wear. 150-day supply. Black is ideal for black hair. | Toppik Hair Building Fibers 150 Day - Light Brown, 1. 94 oz | Dermstore