Coats-Cotton Covered Quilting & Piecing Thread. A premium, cotton covered, polyester, quilting/piecing thread. 3-ply polyester core gives strength with the cotton covering preferred by quilters. The spinning technology creates a smoother, low hairiness, low lint thread. Round thread blends into the fabric. This package contains 500 yards of cotton covered quilting & piecing thread. Comes in a variety of colors. Each sold separately. Imported.