Heavy Duty Filament Sewing Thread

https://www.rongduthread.com/products/heavy-duty-filament-sewing-thread/

If you are seeking out threads for sewing a few of layers or some fairly thick or stiff fabrics, our strong sewing thread is just what you need. The thread is available in polyester and Nylon along with many different sizes and colors. The filament thread will not fray, unravel or break when sewing at high speeds that results in stitching evenly and smoothly. We also apply adequate lubricants to further avoid skipped stitches, breaks and damage caused by extreme temperature of needle during sewing.