Toppik Hair Building Fibers in Dark Brown is a 55g instant hair thickening solution that uses natural keratin fibers to create the appearance of fuller, thicker hair. The fibers bond securely to existing hair strands, providing natural-looking coverage and density for those with thinning hair. Key features: • Large 55g container size for extended use • Made with natural keratin protein fibers • Instantly creates fuller, thicker-looking hair • Weather and wind resistant • Stays in place until next shampoo • Easy to apply and remove • Color-matched for dark brown hair The product uses statically charged keratin fibers that seamlessly blend with existing hair to create natural-looking fullness. It is suitable for both men and women looking to conceal thinning areas or add overall volume. The fibers resist wind, rain and perspiration but wash out easily with regular shampoo. The dark brown shade is specifically formulated to match natural dark brown hair colors for an undetectable finish.