CLASS 15 THREAD BOBBINS: Features 12 prewound 108-yard bobbins of Sew Great #60 weight 100% polyester thread FINE THREAD: Due to its fine nature, Sew Great #60 is an excellent bobbin thread which blends extremely well with similarly colored fabric and top thread POLYESTER THREAD: This 100% polyester smooth filament thread is a lint-free matte-finish sewing thread MACHINE USAGE: Sew Great Bobbins fit standard sewing machines and are great for home machine quilting and sewing projects Sew Great Thread is an excellent bobbin thread which blends extremely well with similarly-colored fabric and top thread. The 60 weight 3-ply thread is 100% polyester for a lint-free matte finish. Each bobbin includes 108 yards of thread for a total of 1296 yard in the 12-pack. Perfect for home sewing machines creating a variety of quilting and sewing projects.