Inspired by early 2000s photographs of Kim Kardashian, Britney Spears and Paris Hilton, Gen-Z shoppers are snapping up body-conscious velour athleisure pieces on resale sites like DePop and Poshmark.

Kate Spade & Co. has begun to pick the bling off Juicy Couture’s velour jumpsuit, one rhinestone at a time. Robin Reed, a Juicy Couture store manager at Fashion Island in Newport Beach, s… ...