Socks are pieces of clothing for your feet, which are made of textile fibres in the form of a tube which is sewn up at the toes. At the heel this tube has an integrated angle which clings to the natural shape of the foot. So much for theory! But besides their purpose of warming your feet, socks also regulate perspiration, absorb sweat and transport it to areas where it can evaporate. A distinction is made between socks, ankle socks, and knee-high socks. Ankle socks extend to the ankle or lower and sometimes are made of only one piece. Socks which extend to the knee or higher are called knee-high socks or over-the-knee socks.