Review on Instant Relief For Injuries: Dealmed Pack Of 3 Disposable Cold Packs - Single Squeeze Activation, No Refrigeration Needed by Heidi Smith

These are a great emergency item to keep in your first aid kid in case of a contact burn (not sunburn) or strain you need to ice. They're not meant for long term, but they will tide you over until you can get to an urgent care or other medical help (assuming you can get there in 30 minutes, 90 if you stagger all three packs). These seem to have the same build quality in terms of durability as the ones I've gotten from medical professionals. They don't last has long as the commercial grade ones, but at this price I wouldn't expect them to.I did get some additional use out of them hiking in the hot sun. If you hold them in your hands or wrap it against the back of your neck you can cool your core a bit (you can Google the research on this if you want. There was a study about a decade ago or more where football players were cooled down by placing their hands in a cooling machine).As long as you buy them for what they're intended for (a short term solution) you won't be upset, not at this price.