Hi all -
I carry both the Grabber Hand and Foot Warmers in my pack, as emergency gear. Thankfully, I don't use them too much, so I was wondering if they expire. I noticed at the bottom that they have a "Validity Date", which I couldn't read, even with a magnifying glass.
I sent an email to Grabber Performance, who makes the Warmers products. They promptly replied, indicating that the expiration date is in 4 years from manufacture and the "Validity Date" (if you can read it) is the same thing as the Expiration Date.
Just figured I would pass that along.