Toppik Hair Building Fibers in Medium Brown is a premium hair thickening solution that provides instant fullness for thinning hair. This generous 55g container features natural keratin protein fibers that blend seamlessly with existing hair to create natural-looking thickness and coverage. Key features: • Made with natural keratin protein fibers • Instantly creates fuller, thicker-looking hair • Color-matched for medium brown hair tones • Weather and wind resistant • Large 55g/1.94oz size • Easy shake-on application • Stays secure until next shampoo The fibers work through an electrostatic charge that bonds them securely to existing hair strands, creating natural-looking density. The medium brown shade is specifically formulated to match natural medium brown hair colors. The product is suitable for both men and women and can be used to cover thinning areas, fill in sparse patches, or create the appearance of a fuller hairline. The fibers resist wind, rain, and perspiration but wash out easily with regular shampoo.