Materials: Iron powder, water, wood flour, activated carbon, salts

How to use:
・Take it out of the outer bag and wait about 5 minutes before using it. It will start to warm up in a few minutes.
・If it is too hot, wrap it in a handkerchief, towel, etc.
-If you are fishing, please secure it with a string or put it in your pants. It won't be blown away by the wind.