These are Okamoto's Marude Kotatsu Socks. This is a store-exclusive color. The heat-generating material warms the San Yin Jiao acupressure point, located above the ankle, which is effective for coldness. Wearing them immediately after a bath will keep you warm even on cold nights. Recommended for those who suffer from cold feet. *Although the outer packaging is not included (only the socks), they are new and unused. Please purchase only if you understand this. For indoor use, wearing them with shoes may cause them to tear due to friction. Please be careful. As they are knit products, it is recommended to use a laundry net and neutral detergent when washing. They will shrink if you use a dryer. The dimensions of each sock are different. Two socks with similar dimensions are paired and sold as one pair. Also, the dimensions will change with wear and washing. - Size: 23-25cm - Color: Aqua Glass - Price: 1,980 yen per pair Price reductions are not possible at this time. We will ship via Yu-Packet Post on the same day or the next day after your purchase.