Toppik Hair Building Fibers in Dark Brown is a revolutionary product designed to naturally conceal thinning hair, providing a fuller and thicker appearance instantly. Made with high-grade keratin protein, the same protein found in real hair, these fibers intertwine with existing hair to create a natural-looking volume. The static charge in the fibers ensures they cling securely to the hair strands, resisting wind, rain, and perspiration. This 275g bottle offers a generous supply for long-lasting use. Toppik Hair Building Fibers are suitable for both men and women seeking to enhance the appearance of their hair effortlessly and discreetly.