Perlan project - high wave flights

I wonder if these guys have fireproof flying suits.

See: http://www.sciencedaily.com/releases...1018075220.htm

Quote from article:

"Previous observations near the Andes Mountains in Peru had found that the
atmosphere directly above some peaks was approximately 100 Kelvin [100
degrees Celsius; 200 degrees Fahrenheit] hotter than in nearby regions and
that the difference occasionally reached as much as 400 Kelvin [400 degrees
Celsius; 700 degrees Fahrenheit]. "

Bill Daniels