BobS, that's a reasonable assumption, but an incorrect one. Here in the city, which is my natural environment, it's all air-conditioning, whether in a building or in a car. In the desert, which is not my natural environment, it's not. Not only am I not an outdoor type by nature, I grew up in the Pacific Northwest and moved here late in life. This is all new to me.

Thanks to everyone for the great replies so far. And even a reply that was specific to the shooting sports. The amount of knowledge around here is phenomenal. I've got lots of reading to do.

Underwear? I had no idea underwear came into play.