Woolly Nylon is a textured thread made from continuous nylon filaments that are crimped and heat-set to create a soft, stretchy, and fluffy feel. Unlike traditional threads that are spun or twisted tightly together, Woolly Nylon is designed to expand and move with your fabric. That means when you use it in the looper of your serger, it provides beautiful coverage, a gentle finish, and plenty of stretch, making it perfect for garments, activewear, or any item that needs to flex and feel soft against the skin.