Thank you for viewing! PCM HOT RING M size Gray Hot Ring [Product Overview] The PCM HOT RING is a thermal supporter that allows you to spend the cold season comfortably. [Temperature Retention Function] This product can maintain a temperature of 49°C for a long time and can be used by soaking it in 80°C to 100°C hot water for about 10 minutes. In particular, it uses PCM material, which applies technology developed for space exploration. [Comfortable to Use] Warming the neck is ideal for cold protection. It can be easily used at home and is the perfect item for cold winters. - Size: M - Product Name: PCM HOT RING - Color: Gray - Temperature Retention: 49°C - Material: PCM material Although it is new and unopened, please understand that it has been stored at home.