ONE AFTERNOON last month, Eristheo Raif freed his shins with the swoosh of two zips.
Mr. Raif, 35, a Los Angeles high-school teacher, had been in a chilly classroom all morning, but it was time for P.E.
Since the bottom halves of his new convertible cargo pants detach above the knees, he could unsheath his shanks in seconds.
When a student inquired, “Weren’t they pants?” Mr. Raif replied, “Yeah, but it got hot, so now they’re shorts!” He last wore convertible cargos in the early 2000s.
Indeed: These pants are “a big thing,” said Katie Devlin, an analyst at trend-forecasting agency Stylus.