Dynarex Instant Cold Pack, 4 Inches x 5 Inches, 24-Count

These cold packs work well functionally, but take note they really are too small. Generally cooling an injured body part takes more volume to effectively work than these packs provide at this size. Order larger packs instead.

Good product, easy to activate, cold quickly, lasts 10-15 minutes. I have ordered packs before that were larger and better for large areas (like back and shoulders) but these are good for smaller areas.

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Other reviewers have mentioned how small these are. I have nobody to blame but myself for that, but one thing I didn't think about is that the smallness of the package also means they don't have enough material inside to stay cold for very long maybe 5 minutes max.

On top of that, about a third of them so far are absolutely impossible to activate. The inner package simply will not burst. So far, I've thrown away three out of the nine I've tried. And I've got a pretty good grip.

Next time, I'll try a different size/brand.

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The cold packs are really hard to pop the inner core to release substance that makes them cold. I had to get a dad from our team to break it for me. I guess its good that they don't break in the gym bag but I should be able to pop them without getting a man to do it. Just sayin'.

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The problem with the instant cold pack is not that it doesn't get very cold instantly after activation, but the length of time it maintains its icy coldness. It's about 5 minutes and frankly, if you have pain or swelling that you are attempting to address, this doesn't do it. Seller should indicate in product specifications how long it is cold after activation.