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From
390
Hand Warmers, 4-pack
Disposable. Perfect for hiking, skiing, hunting, fishing, and other outdoor activities. Also ideal for keeping in e.g. cars and cabins during the winter. The warmers contain iron powder, water, activated carbon, pulverised wood, salt, and vermiculite. When the iron powder is exposed to air, a reaction occurs which produces heat in the warmer. Heat retention varies between the different warmer types. Used warmers can be discarded with household waste.
