Made in the USA using domestic and imported materials. No shaking or kneading required TO ACTIVATE - Remove warmer from outer package, shake to activate. Warmer heats up in 15-30 minutes.

Most chemical hand warmers are thin and small enough to slip into a glove. The disposable type contains a main ingredient, such as activated charcoal, iron powder, or sodium chloride, that reacts ...

A typical chemical hand warmer contains five ingredients: iron powder, water, salt, charcoal, and vermiculite, a naturally occurring silicate mineral. When exposed to oxygen, the water and salt ...