Best Thermal Underwear for sitting in a cold stadium?

[tcuball3]

I recently bought some Hot Chilis micro elite chamois base layers, they were amazing during the Baylor and Iowa State game. Highly recommend: https://www.hotchillys.com/collections/men

 

[Paul in uhh]

I have different preferences for sitting v standing in cold stadiums.

I stood almost the entire game last weekend because those metal benches were making my cheeks go numb