These hand warmers provide 8 to 20 hours of warmth with a 3-4 hour charge. They heat up in 2 seconds and offer three temperature settings: 104-113°F, 113-122°F, and 122-131°F. The snap design allows for individual or combined use for versatile warming options. Price drops from $22.99 to just $9.99 w/ free shipping.

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