thermacare

[boobesque]

ThermaCare heat wraps are made of soft layers of comfortable material with patented heat cell technology, that contain heat generating ingredients (iron, charcoal, salt and water). When exposed to oxygen in the air, these ingredients react to produce heat.
thats according to the thermacare website anyway. taking these ingredients nito account, after my 8 hours of bliss, im sure there must be a way to re activate the cells so thay can be reused.
any ideas?

[TeeGee]

I would suggest that the exothermic ingredients in Thermocare are non-reversible, otherwise they would go down the same road as the everlasting lightbulb.