Thank you for viewing! This is a reusable hand warmer and hand warmer case. I purchased it without carefully reading the instructions on the back and realized after buying it that it's not microwaveable. Therefore, I am selling it as I won't be using it. Please check the second photo for detailed instructions. It is new and unopened, but please refrain from purchasing if you are sensitive to such things. I would appreciate it if you could read my profile once. Instant purchase is OK! ★0210 Re