Dynarex Instant Hot Packs, Single-Use Heat Packs for Immediate Relief, Easy Activation, Instant Heat Therapy for Muscle Cramps, Stiff Joints and Other Injuries, 5"x 9", 1 Case of 24 Hot Packs

I bought a case of these previously from Staples, but they're presently out of stock (pandemic) so I ordered here on Amazon. I see a lot of customers here who are having a bad experience with them. I can only speak from my own experience - I've never had a defective one. I use them for migraines, putting it on the back of my neck. I have arthritis in my hands, but I found them easy enough to pop and they don't require much kneading. They get HOT so don't use it if you're going to fall asleep, if you have nerve problems in the area, etc. The packs have a little bit of a sharp edge. Because of this and the heat, I always wrap it in a cloth napkin or tea towel before putting it on. I get really good pain relief, and they are cheap enough (under $1 each) that I don't hesitate to use one when I need to. Hope this helps!

These are absolutely wonderful! I am in the hospital a lot and they won't allow me to have a heating pad that I use throughout the day at home. I bought these and throw a few in my bag before I go. They barely make a noise when you pop them. A roommate wouldn't even ask what that is because it's so quiet. It covers a good part of my back and does get very hot. The first 5 minutes or so I keep it over my shirt and then once it cools a little I put it directly on my skin.Years ago the hospital had these and after about 30 minutes they would cool off and turn hard as a rock. What I really like about this newer version is they stay warm long past their 30 minute "life". They keep my body heat and stay soft so they actually work for about an hour. The price is great for the amount you get and I would recommend these to anyone!

These state they have a one year shelf life but there is no date or expiration anywhere, so you don't know if you received fresh stock or not. Manufacturer does not respond to inquiry so it is just a guess as to how old this product is when you receive it. Consider this for long term storage.My wife was given this exact product in the hospital and it got very hot and lasted about an hour. These get only luke warm and that only lasts about 15 minutes. I can only assume that they were long outdated when I received them, so beware.July 19, 2013 update. I have gone round and round with the manufacturer Dynarex (888-335-7500) about determining the expiration date and they tell me that there is no practical means of telling the manufacture or expiration date of this product even though it has a 1 year shelf life. They said I would have to work backwards through the seller (Amazon) to the distributor to Dynarex and identify the actual purchase invoice and then they would have to get warehouse records to determine if they are expired. REDICULOUS! And I told them so. Those of you who got bad ones should tell Dynarex so too. How can you sell a product which has a 1 year shelf life but with no means of knowing when it expires. From all the bad reviews I see recently I suspect that Amazon has an expired lot. Working through Amazon they are sending me a replacement for the quantity I purchased to see if they are any better. Amazon is trying, Dynarex is not.

I bought these a while back and they were great. I decided to reorder (March 21) and they were a complete scam. I had to use the entire box in one weekend because they only stayed hot Max for 3 min and some didn’t even stay hot that long. I am so mad that I wasted my money. Something has changed. I’m not sure whether they changed the components of their ingredients or what but something is not right at all

Gives you 15 min heat , I like them

These work very well as instant heat packs, much more reliable than the dry packs and these are more inline with medical use that just handwarmers. However the instructions say to squeeze gently to break the inner bag, NOPE you want to squeeze it like it's a poisonous snake and only your grip can save your life! Like many other instant items they make them to handle a lot of handling and not activate on their own, as such you need to apply a lot more pressure than you think to pop the inner bag. Also note that for medical use they have an expiration date, if you are buying them for personal use, you can treat that just like the expiration date on band aids or salt! (yes both have expiration dates)

I have purchased these packs time and time again but for some reason this lost recent batch barely gets warm. I don't know if it was a defective batch bug the whole bunch are worthless. Very disappointed

I don't have the strength to bust the packet inside, so I have to put it on the floor and step on it. Works great! Heats up really fast and can be used for so many things. Well worth the money!