So Fine! 50-weight polyester thread in Navy 431 is a lightweight, lint-free thread well suited for piecing, quilting, and general sewing. Its fine weight helps seams lie flat and reduces bulk, making it a favorite for both machine quilting and precision piecework. Available from Superior Threads, it is designed to run smoothly through your machine for consistent, reliable stitch quality.

• 50-weight construction for fine, flat seams with minimal bulk
• Polyester fiber for strength and colorfastness
• Great for piecing, quilting, and everyday sewing projects