Say goodbye to constantly winding your own bobbins! Our prewound bobbins are available in Class 15 and L style (the two most common bobbin sizes for home machines) in cotton and polyester. For piecing, quilting, and sewing, enjoy our tightly twisted, low-lint Dream Seam 50 wt. cotton thread made from 100% Egyptian-grown extra-long staple fibers. For embroidery, piecing, and quilting, enjoy Precision 60 wt. polyester thread made from lint-free, smooth polyester filaments. Our prewounds hold up to 70% more thread than self-wound bobbins thanks to our precise manufacturing and winding processes. You'll experience more time quilting with fewer interruptions with our prewound bobbins.