Opening the sealed packaging lets oxygen react with the bag. 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.
• Hand warmers (40 pairs per box) Working temp: 57°C to 70°C
Duration of max. heat: 7 hours CODE: CL281 (40 PAIRS) CODE: CL281A (LOOSE)