Toppik Hair Building Fibers in Medium Brown is a revolutionary hair thickening solution that provides instant fullness for thinning hair. This 12g/.42oz container features natural keratin protein fibers that bond to existing hair, creating the appearance of thicker, fuller hair in seconds. Key features: • Made with natural keratin protein fibers • Creates instant fullness and coverage • Stays in place until next shampoo • Weather and wind resistant • Perfect color match for medium brown hair • Easy to apply and remove The product works through statically charged fibers that securely bond to even the finest hair strands. The medium brown shade is specifically formulated to blend seamlessly with natural medium brown hair tones. The fibers are resistant to wind, rain and perspiration but wash out easily with regular shampoo. Suitable for both men and women looking to enhance hair density and cover thinning areas.