QA Thread brand woolly nylon overlocking filament thread is a superior quality thread, renowned for strength & durability. Typically used in overlocking and coverstitch machines, this 100% nylon thread allows fluffier, fuller bodied stitches and superior stretch properties when compared to regular polyester machine thread. Good for use in underwear, activewear, swimwear, and other stretch garment projects. Achieve flossy, fuller bodied stitches particularly when used in the loopers of your overlocker or coverstitch machine.