These are ski and snowboard socks. They offer high heat retention to withstand the extreme cold of winter. With a special fiber structure and heat-retaining materials, they keep your feet warm. You can enjoy skiing and snowboarding without cold feet, even in cold environments. They provide a balance of lightness and warmth, offering comfort and warmth during winter outdoor activities. Made with 85% high-quality cotton, they are soft and comfortable against the skin, keeping your feet comfortable even after long hours of wear. In addition, 5% nylon, 5% rubber, and 5% polyurethane are used, which help to retain heat while quickly wicking away sweat. With moisture-wicking and quick-drying functions, they dry quickly after absorbing sweat, effectively suppressing sweat and odor, and maintaining a comfortable feel even after long hours of intense sports. They provide an excellent fit. They have a moderate compression that firmly secures the feet without excessive pressure. This prevents the socks from slipping inside the shoes, allowing you to focus on your activity without any hindrance during sports. They also have a function to protect the feet, reducing the risk of injury. They have a color-fade prevention function, so they maintain their vibrant color even after repeated washing, keeping them looking like new. They are machine washable, so you can simply put them in a laundry net and wash them without worrying about staining other clothes. These socks are unisex. They fit a wide range of people, from 21-25cm, for both women and men. Thank you! (^ ^) S-132-20