I ordered in January 2012, and these expire in 2014.
Answered on 1/24/2012 12:00:00 AM by Prod. Spec. Ryan from Sierra Trading Post
I've been ordering these for the last five years and there are always carryovers from one year into the next. I've never opened a pack that did not warm up, but I do notice that they may not last the 6 to 8 hours. Warmers that I've carried around in my bag become useless and I put that off to possible punctures and whatever happens in our bags on a daily basis.
Answered on 3/1/2012 12:00:00 AM by Diane, in da Bronx from Bronx, NY