Embroidery is a nice way to present your company on your apparel. The embriodery thread can make a difference. What do we mean? By using polyester thread we can avoid discoloration. Embroiderers like using rayon thread because it is easier to use for production, Rayon does not leave a residual after a production run, but after a wash in bleach, be careful. As for polyester it does not bleach out. What do you think?