The Sf529 So Fine Chianti Polyester Quilting Thread by Superior Threads is a high-quality #50 polyester thread designed for quilting projects. With a matte finish and smooth texture, this lint-free thread comes in 134 vibrant colors, offering excellent blending capabilities for both longarm and home machine quilters. Each cone contains 280 yards of thread, making it a versatile choice for various quilting applications. Additionally, So Fine!#50 serves as a perfect bobbin thread, ensuring precision and durability in your quilting creations.