Sometime in the early ‘90s, I walked out of a Foot Locker with a pair of Reebok Pumps and the misguided notion that I was about to become a better basketball player. The technology—or, more likely, the marketing—was irresistible: a small, basketball-shaped dome in the tongue that, with a few firm presses, supposedly molded the shoe to your foot. This was back when you actually played in your sneakers, after all, and who didn’t want the perfect fit? So I pumped. I laced up. I…

