Works up to an hour; depending on the outdoor temperature.
WARNING: Do not pick up the hand warmers with bare hands after boiling. Do not fully bend or crack the metal chip. Not Microwavable. Do not puncture. Keep out of reach of children.
ACTIVATION
Grasp the metal plate between two fingers and slightly bend repeatedly back and forth.
WARMTH
The gel inside will become crystallized and warm.
REUSE
Boil the hand warmer in water for about 10 minuets until the crystals in the hand warmer go back to a liquid state.
