Toppik Fiber Medium Brown uses advanced keratin protein technology that electrostatically bonds to your existing hair, creating an instantly fuller appearance. This lightweight formula adheres seamlessly to all hair types and textures, effectively concealing thinning areas, gray roots, and visible scalp. Engineered to withstand wind and moisture, it maintains its hold throughout the day without flaking or washing out easily. The Medium Brown shade blends naturally with darker hair tones, delivering professional-grade coverage that looks and feels completely natural.