We call our socks "Super Sustainable Socks" for a reason. Because our socks are free from polyamide and polyester and are therefore super sustainable. We don't even use synthetic fibers for the connecting seams, as is usually the case. Unlike conventional socks, ours are made from 97% Fairtrade organic cotton and 3% Roica. This is an elastane that is harmless to the environment. Our socks also offer you a super comfortable, seamless feel as they are hand-linked and feel soft on the skin.