I have read in here about a lot of guys using the disposable hand warmers and how great they are.
What are you using as I have bought some twice and they were totally useless. I tried to throw some in my waders when I went duck hunting with no affect.
After the hunt I opened another one and it seemed to get luke warm for about 10 minutes and then died. I purchased these new the day before with a good date on them.
Are some brands better than others or did I just get a bad batch? I'd like to try some more but don't want to throw my money away for nothing.