The Cervelo club sock has a supportive leg band to keep the sock in place, but it is not too restrictive as to disrupt circulation and comfort. This top cuff is doubled over and the stitching runs around your lower leg. The top section of the body of the sock is a diaphanous web which means it is super thin and aerated for maximum breathability. The rest of the body has a slightly thicker and more elastic composition to offer more support.