In January, Alo Yoga co-founders Danny Harris and Marco DeGeorge hired Benedetta Petruzzo—the former C.E.O. of Miu Miu—as their first international chief executive. Alo Yoga, of course, has mostly built its reputation in athleisure, driven by bestsellers like its Airlift leggings and matching bra sets that hit with the Calabasas crowd and then the millions who aspired to their ranks. Last year, the Lululemon and Nike alternative was estimated to do over $1.5 billion in U.S. direct sales, according to Consumer Edge, which aggregates data from 40 million U.S. credit cards. (Alo Yoga did not respond to requests for comment for this story.) So why is it bringing in a C.E.O. with luxury experience, including a stint at Dior?