I could see that happening for heat: hot water bags are amazing, and being able to "wear" one occasionally on the upper back (using some improvisation with an e

I could see that happening for heat: hot water bags are amazing, and being able to "wear" one occasionally on the upper back (using some improvisation with an empty backpack to keep it in place) has been one of the few things I consider a benefit of WFH. But cooling? Sure, the technology is doable but won't you get a very huge mess with condensation?