Gütermann Sewing Thread Polyester 38 Grey is a general purpose polyester thread for both hand and machine sewing. The thread is suitable for patchwork, quilting and similar needlework. Polyester thread is more durable than cotton thread and is therefore better for sewing on buttons. Polyester thread has several advantages: It is more durable than cotton It does not shrink when washed It does not wrinkle It does not absorb as much moisture and therefore dries quickly Colour: 38 Grey There are 100 meters per spool. The thread is made of 100% polyester.