“YOU’RE SWEATY!” was the gracious way my fourth-grader greeted me, a tinge of disgust in her voice, as I arrived to pick her up from school one recent Thursday.
She was, of course, correct: I’d just completed a 6-mile run on that sunny Brooklyn afternoon, with temperatures ramping into the high 70s, and my face was surely glistening. Still, didn’t she notice how the front of my T-shirt was only a tad damp around the collar? Due to the latest in high-tech fabrics and construction techniques, I was otherwise nearly, mostly,...