What is Reddit's opinion ofEmergency Zone ReDo Reusable Long Lasting Pocket-Sized Hand Warmers. Non-Toxic. Great for Cold Weather, Heat Therapy, Joint, Back, and Muscle Pain, Cramps, Arthritis.?
Meh. This type of thing has been around for years. The only interesting part is that they nucleated crystallization optically, but honestly that's not particularly surprising either.
Popular alternatives to
Emergency Zone ReDo Reusabl...
HotHands Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up to 10 Hours of Heat - 40 Pair