Sulky 40 wt. Poly Deco is a top quality, strong, 100% polyester, shiny thread that is especially suited for appliqué and embroidery on children's clothing, work clothes, sports clothes, or any project where the thread will be visible on top. Great for garments that will need to be washed frequently or washed with soap containing brighteners and bleach.. 250yd small snap spool. 40wt.