An instant cold pack is a device that consists of two bags; one containing water, inside a bag containing ammonium nitrate, calcium ammonium nitrate or urea. When the inner bag of water is broken by squeezing the package, it is allowed to dissolve the solid in an endothermic reaction. This reaction absorbs heat from the surroundings, quickly lowering the pack’s temperature. Instant cold packs are a convenient direct replacement for crushed ice used as first aid on sport injuries, and can be carried as first aid to remote or wilderness areas where ice is unavailable.
Works great at a very fair price After doing some re-con at the local Wal-Mart & Target, there was no question this was a very good price for such an indispensible item.My husband keeps one in his tennis bag for those days when he feels a little sore. And the fact that you obviously don’t need to freeze them and can take them anywhere is such a great advantage.Each packet is roughly 8″ x 4″ so they’re good for adults and children alike. And the kids always love the “wow” moment when they…
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It does get cold.
Basic bag of scientific ice
Works great at a very fair price After doing some re-con at the local Wal-Mart & Target, there was no question this was a very good price for such an indispensible item.My husband keeps one in his tennis bag for those days when he feels a little sore. And the fact that you obviously don’t need to freeze them and can take them anywhere is such a great advantage.Each packet is roughly 8″ x 4″ so they’re good for adults and children alike. And the kids always love the “wow” moment when they…