Finally Hair building fibers are extremely popular on Amazon because they are the highest grade fibers available at the lowest cost. These fibers conceal thinning areas in seconds. Simply shake them on your thin areas and watch them disappear and look like natural hair in seconds. Finally Hair fibers require hair spray to lock the fibers in place until you shampoo them out. Check out the Finally Hair Strong fiber lock spray available on Amazon. Please see the color chart which is made up of actual pictures of the hair fibers taken in natural sunlight (some device screens can vary the colors slightly). Finally Hair fibers are the pro health choice. For example there is no ammonium chloride (also known as Cetrimonium Chloride) in our fibers. Google ammonium chloride and you will see why. These award winning fibers are hypo allergenic, won't clog your pores, are perspiration and wind resistant, easy to apply, and hair surgeon recommended. We allow these fine ingredients in our hair building fibers Gossyplum Herbaceum, Keratin, Polymer, FD&C Yellow No. 5 (CL 19140), FD&C Red #40 (Cl 16035), Black 1 (CL 28440) FD&C Blue No. 1 (CL42090), D&C Orange No. 4 (CL 15510), D&C Black No. 2 and other similar dyes.