I´ve run 11 'hundreds' prior to Badwater and have blistered on the bottoms of my feet during the hotter races. The blisters have never been debilitating, but I was concerned about Badwater, which is a different animal altogether.
I made it a point to run the Badwater to Stove Pipe Wells section of the course a couple of times during training. This is the hottest part, where many runners don´t finish, and and my feet were noticeably -- and uncomfortably -- hot.
During the race, temps hit 51°C (124°F) from Badwater to Stove Pipe Wells. But my feet were running comfortably and my soles were heat-free in comparison to training. I had no discomfort to the soles of my feet where I usually develop blisters.
It is safe to say that my lack of usual blistering to the soles of my feet can be credited to the aerogel insoles. This is huge because I know that blistering to the soles is a race-stopper.
I highly recommended aerogel insoles. They kept the shoe noticeably cooler and the soles of my feet blister-free.
Xy Weiss, Endurance Runner