This wonderful sock yarn can be used for a variety of projects - it's great not only for socks. Each sock will be a unique piece of art.The yarn is a blend of 75% Patagonian wool and 25% polyamide (biodegradable). According to the manufacturer, this synthetic fibre will be decomposed by the natural processes of the earth in around five years.A pro tip by Schoppel: work the balls from the outside.