Racing demands more than grit. Between 120 F cockpit temperatures and 5 to 10...

https://speedy-wiki.win/index.php/The_Oven_on_Wheels:_Decoding_the_Reality_of_NASCAR_Heat_Stress

Racing demands more than grit. Between 120 F cockpit temperatures and 5 to 10 lb sweat loss, recovery is now a competitive edge. This article breaks down how the garage is evolving