Bottom Line from Superior Threads is a 60 wt. 2-ply polyester thread. Designed for applique, bobbin thread, and quilting. Lint free never felt so good. Designed with award-winning quilter Libby Lehman, The Bottom Line makes a fantastic bobbin thread for any type of sewing. Its lightweight, blending colors are easily matched with any top thread. Invisible applique and binding is a breeze with Bottom Line as it glides through layers of fabric.