This is a non-binding, extra wide mid-calf sock for ladies and men with wider feet who are tired of squeezing into tight, uncomfortable socks. These comfort fit, extra wide athletic socks are great for wide feet, swollen legs and people with medical conditions such as edema, diabetes and circulatory problems. Stretches very wide through the whole sock, will not cut off circulation and is one of our best selling socks! Thicker athletic/gym sock weight material. USA made of 91% Cotton, 7% Nylon and 2% Spandex