I am selling this item because I purchased it but rarely used it, and I don't think I will use it in the future. These are disposable body warmers that maintain a temperature of approximately 62°C for about 12 hours, perfect for cold weather対策. - Quantity: 19 - Type: Disposable body warmer - Temperature: Approximately 62°C - Duration: Approximately 12 hours - Usage: Cold weather対策 Thank you for looking.