The basics Toppik Hair Building Fibers, made of colored keratin protein, blend undetectably with existing hair strands to instantly create the appearance of naturally thick, full hair. The benefits Toppik Hair Fibers resist wind, rain, and perspiration for long-lasting results in all conditions. The uses Also great for part lines, covering extension tracks and touching up roots between hair color appointments. Easily washes out with shampoo.  The bottom line Available in nine shades that can be mixed to match virtually any hair color, Hair Fibers work for all hair types and textures.