Keratin Hair Building Fibers KitHurry, before it is gone! Limited time remaining! Fast Delivery Within 14 21 business days 100% Money Back Guarantee Keratin Hair Building Fibers resist wind, rain, and perspiration for long lasting results in all conditions. Available in nine shades that can be mixed to match virtually any hair color, Hair Fibers work for all hair types and textures. Also great for part lines, covering extension tracks and touching up roots between hair color