Well, I just learned something new! Thank you.
Bonus video: Aerogel Superinsulation Blowtorch Demo: Hershey’s Kiss
https://www.youtube.com/watch?v=5sw1tNeJ0Rw
They put aerogel in mountain climbing boots, because a climber complained that his feet were always cold. When he tried them out, they noticed that he really rushed to get to the top. Then he tore off his boots and his feet were both very red.
The first production call for it is by NASA, that wants to use it to line satellites.