Thank you for looking. These are socks that raise the temperature by +3.6℃ using far-infrared material. - Brand: coen - Model Name: Pokapoka Kairo Socks - Size: 23-25cm - Temperature Adjustment: +3.6℃ - Material: Far-infrared material These are new, but they will be folded for shipping. Please only purchase if you understand this. If you wish to purchase multiple items, they can be shipped together from 2 items, but please note that some colors may no longer be in stock. This color is the last one available. Also, as these are shipped from Okinawa, it will take about 4-5 days. Please understand that this will take longer than shipping within Honshu. Thank you.