Okamoto's Socks Suppli MEN Marude Kotatsu Socks. ☆Brand new, unused☆ A big hit as legwear for cold protection! Socks from Okamoto's "Marude Kotatsu" series. The secret to warmth is the unique knitting method that warms the San'in-ko acupressure point, located on the ankle, with heat-generating material. If you are concerned about cold ankles, please give these a try. Size: 25-27cm Color: Ash Blue Price: 2200 yen Okamoto, okamoto, men's, socks, thermal, warm, 25, 26, 27, autumn, winter, cold, sensitivity to cold, cold protection, cold prevention