The Bottom Line is a 60 wt lint-free filament polyester. It is ideal for hand and machine applique, detail quilting, embroidery, binding, micro-stippling and English Paper Piecing. The silk-like finish allows it to glide through the layers of fabric. It makes a fantastic bobbin thread for any type of sewing and it's easily matched with any top thread. The Bottom Line, lint-free polyester thread, Gray, 60wt, 3,000 yards, by Superior Threads.