GÜTERMANN Cotton 30 is a 30-weight cotton thread that creates crisp, slightly raised stitches for decorative sewing. This 300 m (328 yd) spool in Colour 9831 works well for quilting and piecing on medium to heavy fabrics, denim, canvas, and many woven materials. For best results, test tension on a scrap, choose a needle size suited to your fabric, and confirm stitch balance before stitching the final seam.