Toppik Hair Building Fibers in Dark Brown is a revolutionary hair thickening solution that provides instant fullness for thinning hair. This 12g container features natural keratin protein fibers that seamlessly blend with existing hair to create the appearance of thicker, fuller hair instantly. Key features: • Made with natural keratin protein fibers • Creates instant fullness and density • Seamlessly blends with dark brown hair • Weather and wind resistant • Stays secure until next shampoo • Easy to apply and remove The dark brown fibers work through static electricity to bond securely to existing hair strands, providing natural-looking coverage and density. The product 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 12g/.42oz size is convenient for regular use.