Material: The calf socks are made of cotton, polyester fiber and spandex, which are thick and warm, lock the body heat, and increase the temperature of your feet in winter Toe and heel reinforcement: The toe and heel are reinforced, which is tight, wear-resistant, flat and non-smooth Warm knee-high tube: Thick loops keep warm from the cold, thicken from the soles of the feet to the calves, making it more warm and thick Description: Elastic stockings: using high-quality high-elastic elastic, long-wearing does not deform, does not strangle the feet, and promotes circulation