New Kiribai "Ashi no Hienai Fushigi na Kutsushita Crew Socks" are thermal socks specifically designed for cold feet, sold by Kobayashi Pharmaceutical. Features: Heat Retention Fiber: Uses "Heat Retention Fiber TM," which contains air within each fiber, providing high heat retention. Insulation Layer: An approximately 5mm thick pile knit insulation layer cuts off cold air and prevents heat from escaping the socks. Type: Crew socks, reaching from the toes to the ankles. Size & Color: Size is 23-25cm. Color is black. Manufacturer: Kiribai Kagaku Co., Ltd. Distributor: Kobayashi Pharmaceutical Co., Ltd. Country of Origin: China Materials: Polypropylene, Acrylic, Wool, etc. Color: Black Size: 23-25cm ✅ Please refrain from purchasing if you are sensitive to items stored at home. ✅ The price tag has been removed. Please be aware that there may be some stickiness.