Snapping the internal starts to generate instant heat.
The internal chemical reaction generates long-lasting heat.
About 50-60 minutes for Hand Warmers.
Heat when you need it fast.
--- Reusable hand warmers --- Recharge by boiling in water for 10 to 15 minutes. --- Remove and allow to cool to room temperature. --- They are then ready for use again and again.
When you first see or show them to somebody it have the "WOW" effect.
