Toppik Hair Building Fibers in Dark Brown is a 27.5g hair thickening solution that instantly creates the appearance of fuller, thicker hair. Made with natural keratin protein fibers, this product seamlessly blends with existing hair to conceal thinning areas and add volume. Key features: • Made with natural keratin protein fibers • Instantly creates fuller, thicker-looking hair • Color-matched for dark brown hair • Weather and wind resistant • Stays secure until next shampoo • Easy to apply and remove The product works through statically charged fibers that bond securely to existing hair strands, creating natural-looking density and coverage. The dark brown shade is specifically formulated to match natural dark brown hair colors. The fibers resist wind, rain and perspiration but wash out easily with regular shampoo. Suitable for both men and women looking to enhance hair appearance and cover thinning areas. The larger 27.5g size provides extended usage compared to smaller packages.