Warmth is Popular! Marude Kotatsu Socks Set of 2: Black and Gray Size: 23.0 - 25.0cm Socks Suppli is a brand of Okamotoya socks. Warmth stimulation of the ankle acupoint "Sanyinko". The "Marude Kotatsu" series warms the body from the feet using a specially developed special insulation and heat-generating material. Socks like "Marude Kotatsu" that are warm for cold feet. * Although new, the package will be opened and flattened to fit within 3cm for packaging (the original package will also be included). * No price reduction is possible.