Instant Heat Pack/Cold pack, Reusable, Family Packs for Back Pain, Neck Pain.
More than 81% sold
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More than 10 available
"Once the pad has given off all of its heat it will harden. The pad should remain liquid as it cools. If crystals form as the pad cools it has not been boiled long enough. Boil water in a pot. If even one tiny little crystal is left, the liquid will quickly re-solidify."
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