We call our socks "Super Sustainable Socks" for a reason. Because our socks are free from polyamide and polyester and 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 a super comfortable, seamless feel, as they are hand-linked and soft on the skin. Fit: Regular, medium-high Free of polyester and polyamide Hand-linked for a seamless feel The elastane "Roica" used is biodegradable without releasing harmful substances into the environment Material and Care 97% organic cotton, 3% biodegradable elastane Processing: circular knit fine knit Vegan Free from harmful substances according to the GOTS standard We recommend washing this sock on a gentle cycle at 30° to prevent shrinkage and to maintain its beautiful appearance. Cleaning and air drying your laundry at lower temperatures will save energy and money and help you minimize your carbon footprint.