Cold and hot compress packs allow you to treat a wide array of injuries at anytime and anyplace. Cold compresses are best to reduce swelling and inflammation. Hot compresses increase blood flow and are typically used on older injuries, primarily muscle strains and pulls.
Instant cold packs work by causing a chemical reaction to create a cold, icy compress. A cold pack features two pouches, one inside the other. The outer bag contains water. The inner bag contains a chemical compound. To activate the compress you squeeze both bags, which breaks the inner bag, allowing the chemical compound to mix and dissolve in the water. This reaction causes the pack to become cold, making it ideal to ice injuries. Cold packs are convenient because they can be used when ice is not available. Instant cold compresses are handy for sports injuries, as well as any injury that results from outdoor activities since ice is not always readily available. Another advantage of the instant cold compress is that is does not melt and leak, as ice based compresses do.
Instant hot compresses work the same way, they just feature a different chemical compound in the inner bag to create soothing heat instead of icy cold. The hot compress is arguably even more convenient than the cold compress because typically to apply heat you would need access to electricity if using an electric heating pad. Or at least have the ability to boil water and fill a hot water bottle. The instant hot compress lets you heat an injury wherever, whenever. They are also super convenient for use at home since unlike an electric heating pad you do not have to worry about accidently leaving it on, and the durable sealed bag is less likely to leak than a hot water bottle.
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