Warm gloves

[jasondbaker]

I really want a pair of these gloves:

[DanL]

I would love to try these underwater, but....
The heat transfer fluid may not vaporize adequately at depth because of the increased pressure. Might make the efficiency very low. Also, compression of the wick may hinder fluid backflow to the upper arm for revaporization. As usual, I'm probably wrong about this engineering stuff.
Anyway, my DC drygloves have been pretty warm up to at least 45 minutes.