Warm socks made of acrylic and polyester blend, size 24-26cm, black. - Brand: BS-FINE - Model Number: BL0005 - Size: 24-26 - Color: Black - Materials: Cotton, Acrylic, Polyester, Nylon, Polyurethane Thank you for viewing. Brand new, unopened Wearing Ganban-yoku (Rock Bath) BS Fine Five-Finger Socks Unisex, Made in Japan L size (24-26) Gray These five-finger socks are comfortable and warm, keeping your toes dry and comfortable. "Wearing Rock Bath" "Wearing Ganban-yoku" BS Fine is a new material that encapsulates natural mineral "Black Silica" reduced to a diameter of 3/10,000mm into polyester fibers with a diameter of 3/1,000mm. Because the "Black Silica" is enclosed within the fibers in a core-sheath structure, the mineral will not dissolve or peel off even after washing. In addition, "Wearing Ganban-yoku" BS Fine warms the body itself with "Black Silica," so it is a dry, warm material that does not get stuffy. Even if the fabric is thin, it warms the core of your body. You can comfortably use it throughout the four seasons without getting stuffy even in hot places. Please see the official website for more information ^_^