For the longest time, every single cool girl solely wore slim-fitted leggings . . . and then their more chic flared cousin came up on the scene and changed the game. Flared leggings aren’t new, but with the Y2K resurgence, we’re seeing them more and more on the streets of New York City, L.A. and Miami. And obviously, we had to get them in our rotation for workouts, travel days and beyond. Consider flare leggings as the polished version of the classic tights style. Simply put, they’re elevated, rich and sleek, and why ‘It’ girls and celebrities like Hailey Bieber, Ana de Armas and more wear the...