Make your sewing more eco-friendly and reduce waste by using this 100% recycled thread. Gutermann's rPET Sew-All thread is crafted entirely from 100% recycled polyester derived from repurposed plastic bottles. The bottles go through a meticulous process of cleaning, flaking, melting, and extruding into ultra-fine microfilament fibers. The result is a high-performance thread with pristine uniformity, a luxurious silky luster, and superior sewability. Suitable for all types of fabric and seams, for hand or machine sewing. Recommended machine needle: Universal, size 80 to 90