Mettler Silk-Finish cotton quilting thread. This thread is 40 wt, made of Egyptian cotton. Each spool contains 164 yards. Black and white also come in larger spools of 500 yards. This thread, slightly thicker at 40 wt vs. normal 50 wt, works well for sewing, quilting, embroidery and more. It doesn't snap easily, and the colors stay true.

From the manufacturer: With Silk-Finish Cotton 40 you are buying the right sewing thread for your patchwork and quilting projects. Because the high-quality, somewhat thicker thread made of 100% long-staple Egyptian cotton is ideal for creating beautiful decorative seams and embroidery patterns.