Sulky Polyester Bobbin Thread is a lightweight, inexpensive 60 Wt. polyester thread that you can use in your bobbin with Sulky Rayon or Metallic Thread on top; available in white and black on 475 yd. or 1100 yd. snap-end spools. For ultimate convenience, get Sulky pre-wound, plastic-sided bobbins of 60 wt. continuous filament polyester in white, black, beige or gray; virtually lint free and the perfect weight for most every sewing, quilting, or embroidery project.