Socks Supplement: Room Socks, Just Like a Kotatsu Color: Gray Size: 23-25cm Material: Acrylic Thanks to a unique knitting method, this product warms the Sanyinkou point, a pressure point on the ankle that protects against cold, keeping your toes warm as well. *The product will be shipped in a Yu-Packet Post Mini envelope after being removed from its original packaging. *When washing, use a laundry net and wash with a neutral detergent. Although this product is new and unused, it is a foreign product, so there may be some loose threads. Please understand this before purchasing. Autumn/Winter, Women's, Cold Protection Kotatsu-style, Similar to Kotatsu Socks Warmth, Warm