How long can these be stored before they go bad?
Unactivated 72 Hour Heat Packs
I would like to get some of these in case of a power outage in the future. How long can they be stored before going bad?
Open Jan 16, 2020 - 04:25 AM
Jan 16, 2020 - 05:57 AM
The expiration date for the ones we have and are shipping now is 4 years. After that date, the chemical reaction will still occur but it will be slower and not reach full temperature maximum and duration.