Toppik Hair Building Fibers in Dark Brown is a revolutionary hair thickening solution that provides instant fullness for thinning hair. This 27.5g container features natural keratin protein fibers that bond to existing hair strands, creating the appearance of thicker, fuller hair immediately. Key features: • Made with natural keratin protein fibers • Instantly creates fuller-looking hair • Color-matched for dark brown hair • Weather and wind resistant • Stays in place until next shampoo • Easy to apply and remove The product works through statically charged fibers that securely bond to even the finest hair strands, providing natural-looking coverage and density. The dark brown shade is specifically formulated to blend seamlessly with dark brown hair tones. The fibers resist wind, rain and perspiration but wash out easily with regular shampoo. Suitable for both men and women looking to enhance their hair's appearance.