My take aways from that pod on base layers:
- The farther from the skin that the evaporation occurs, lessens the cooling effect on the body.
- The more airflow over the skin the better the cooling.
- The addition of a base layer, both, moves the point of evaporation away from the body, and also restricts the airflow that reaches the skin.
I just don’t see how wearing 2 pieces of clothing will somehow increase cooling capacity.