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Climing boot for Everest, K2 or any high altitude climbing..
A triple layer plastic boot, the outer 2 layers made from carbon kevlar composite (or similar in plastic) and the inner a soft fitting liner. There is a gap between the 2 outer layers which are then sealed so as to create a vacuum. This would
keep the feet at a more constant temperature than a normal boot. A piezo crystal is present in both heel and toe and a heating element runs throughout the inner liner. As you walk you generate heat.
This would keep your toes warm (minimum) if you didnt want to take oxygen with you.
||The piezo is just an aside and probably unnecessary.
The main idea is the vacuum as insulation to prevent heat loss...............Although a piezo could be used as part of a charging circuit for batteries lol
||But the vacuum wouldn't prevent heat from escaping through the top of the boot. Maybe a vacuum suit...
||It would help slow the heat escaping...Peter, Kevlar possibly because you're going to be climbing over sharp rocks and such...