Protect your icy cold feet! Warm, thick and ultra-thin options available. Keeps you warm even on cold floors, without needing to wear two pairs. Ultra-thin for going out with shoes, etc. Thick for indoors or with sneakers, etc. ^_^ No discounts. Size: See photos Made with Toyobo's moisture-absorbing and heat-generating fiber. Heat α fiber blend. A must-have item for women with cold feet, made with functional fibers that are warm, don't get cold, and don't get stuffy. These socks have a 3-layer construction using heat-generating Heat Plus α fiber and macaroni fiber.