Ace Instant Cold Compress (Pack of 12)

These work as well as can be expected for this type of product. The chemical reaction really just depends on proper mixture and making sure they are not old and therefor containing degraded, less potent chemicals to react. Anyway, I bought one of these at the pharmacy I work at to experiment with it to see how cold it would get and for how long. I tried other brands as well, but this one seemed to be among the best as far as how cold it got and how long it stayed cold. Each was tested at room temperature of 23.5C (~74F). At its coldest which was achieved after about 1 minute, it had a surface temperature of 9C (~48F). No, that is not nearly as cold as a pre-frozen ice pack, but you cannot expect that from a relatively safe chemical reaction like this. Anyway, it stayed "cold" to the touch for approximately 30 minutes after which it had a surface temperature of 20C (~68F) which in my opinion, relative to the ambient temperature of 23.5C, no longer provides any relief no matter what reason you are using it. Keep in mind, if used outside in the heat, this is not going to get as cold or stay cold as long...also, it is going to absorb body heat when you actually use it so plan on it lasting less than my test. I only tested these for keeping with me in my tactical vest while playing Airsoft so that when we stop in a safe location while playing or when we take a break, I can pop one out and cool off a little faster in the hot Texas heat. I plan to test the Dynarex packs that Amazon sells next since they are pretty cheap. Hope this helped.

These icepacks work very well; they stay cold for longer than many of the generic ones sold in drugstores (although Walgreen's has a competitive product that is occasionally discounted). Now that Amazon has made this available at "Free Super Saver Shipping" prices, this is the best price, including shipping, that I've found on the web for this product, which I rely on for pain relief throughout the day. I've tried some other brands which are priced lower and they do not get cold enough or stay cold enough to even bother with. This product has literally allowed me to continue working by providing pain relief on the go, at a price I can afford.

The packaging for this product is ridiculous. Two icepacks are in a red box, and then several red boxes are placed in a white cardboard sleeve, and then the white packages are placed in a corrugated cardboard box, which is then placed in a larger traditional Amazon corrugated cardboard box. The red and white packaging are not recyclable. I really don't understand the thought process of how items are packaged that truly don't need that much protection from breakage.

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I purchased these instant ice packs for my sons to carry in their athletic bags. If my boys are at an away game and receive an injury or have soreness, they can grab one of these and cool the area on the bus ride home. The instant packs are not a substitute for a good old ice pack which we use at home. These instant packs serve their purpose well, a convenient way to get a quick cool down of an injury until a traditional ice pack can be obtained.

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You should first be aware that these to not get even close to the temperature of ice. Further, the lack of any structure and the large volume of the bag compared to the small volume of material means that the pack can only wrapped around the sore anatomy. For my daughter, we needed to ice her heel. The design of this product is such that the material just flowed around the to outside, leaving her heel with essentially no cooling at all. Finally, the cold does not last long about 15 minutes at the most. You should also note that this item CANNOT be returned, as it is classified as a hazardous material.

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Bought these locally. Used two of them. Neither one got cold. Returned others