Toppik Hair Filler instantly thickens thinning hair with natural-looking results. This lightweight, keratin-based formula bonds to existing hair strands, creating fuller volume in seconds. The medium brown shade blends seamlessly with most hair colors. Simply shake the applicator bottle over thinning areas, and the static-charged fibers adhere to your hair for all-day coverage. Water-resistant and sweat-proof, it holds through daily activities. Easy to remove with regular shampooing. Perfect for addressing hair loss, thinning patches, or adding density before special occasions. One 12g container provides weeks of daily use.