Gutermann Premium Serger Thread, made from 100% Polyester, exhibit extremely strong threads which will easily lend a hand to hours of problem-free and uninterrupted sewing on 3-thread and 4-thread overlock machines, as well as standard serger machines. Displayed on Mini King spools, Gutermann Premium Serger Thread is ideal for overlock and serger sewing. Easy to use, this high performance premium serger thread is ideal for all kinds of fabrics and seams. Carried in a wide range of colors for a variety of sewing applications.