These Hand Warmers come in packs of 2 and very easy to use. Opening the sealed packaging lets oxygen react with the bag and within a minute they release constant heat.
Typically, these packs are used for comfort, increasingly however, they are used in rescue operations where a survivor is trapped in a cold or exposed place.
Working temp: 57°C to 70°C Duration of max. heat: 7 hours
x2 per pack