Women’s Pacas brand compression socks Size M/L (8.5-11.5+) With a 12-15mmHg compression level, these socks are designed to maintain blood flow and reduce swelling and inflammation. At the same time, they are soft, breathable, and durable. Composition: 44% Nylon, 27% Alpaca, 22% Acrylic, 5% Spandex, 2% Olefin