Thank you for looking! PCM HOT RING, Size M, Gray, Hot Ring [Product Overview] The PCM HOT RING is a warming supporter that allows you to spend your time comfortably even in the cold season. [Temperature Maintenance Function] This product can maintain a temperature of 49℃ for a long time and can be used by simply immersing it in hot water of 80℃ to 100℃ for about 10 minutes. In particular, it uses PCM material, which applies technology developed for space exploration. [Comfortable to Use] Warming your neck is ideal for preventing cold. It can be easily used at home and is a perfect item for the cold winter. - Size: M - Product Name: PCM HOT RING - Color: Gray - Temperature Maintenance: 49℃ - Material Used: PCM material It is new and unopened, but please only purchase if you understand that it has been stored at home.