The Toppik Hair Building Fibers are made of colored keratin protein statically intertwined with your natural hair strands blending seamlessly with them. The application is smooth and instantly enhances your appearance by giving your hair a thicker fuller look. The product is formulated to resist wind and perspiration. The product works for all hair types and textures. It effortlessly covers parting lines gray roots and hair thinning areas. Available in Dark Brown.