The sealskinz hydrostop mid weight mid length sock is calf length and features windproof waterproof and breathable characteristics making it the perfect sock for ever changing weather conditions this sock has been lined with merino wool which will not only keep your feet warm and dry but also offers quality moisture management meaning any sweat on your feet will be pulled onto the outside of the sock so that your feet remain dry and comfortable in the cuff of these seaslskinz cycling socks i