TOPPIK Hair Building Fibers instantly give you the look of thicker, fuller hair. Made of natural, coloured Keratin protein that is naturally statically charged, TOPPIK Fibers intertwine with your existing hair for a completely natural look. TOPPIK resists wind, rain and perspiration but removes easily with shampoo. Also great for part lines, covering extension tracks and touching up roots between hair color appointments. Easily washes out with shampoo