Perma Core brand thread is a high performance, strong filament thread made in the USA in North Carolina. This 2-ply, 100% polyester thread is perfect for use in quilting on both longarms and domestic quilting machines. The ultra-strong, polyester core is wrapped in spun polyester that is soft and cotton-like. High-speed stitching is no problem for Perma Core Quilter's Edition Thread. It's also colorfast and UV resistant! Browse our selection of over fifty colors.