I’m what you call a recreational runner (~3 times a week, more often if chased). Nowadays you see lots clothes with high tech fabrics that promise to “wick” away your sweat, i.e move it from the surface of your skin to your next layer of clothing or into the air. I own some of these shirts, and they work great! But what’s the actual benefit?
In the summer, the ads proclaim wicking sweat will keep you cooler, and in winter will keep you warmer. I wholeheartedly buy the ‘warmer in winter bit’, since nothing is colder than getting hit with the winter wind in a wet shirt. But I’m skeptical the same mechanism can also keep you cooler in summer. That’s like saying tax cuts for the rich are good for booming economies as well as recessions. :dubious: (sorry, couldn’t help it).
To make a long question longer, and maybe more scientific, by what mechanism does sweat cool you? Is it primarily by allowing greater conduction of heat from the skin to the air, or is it conduction of heat from within the body out onto the surface of the skin?