The white ʙuттon-up shirt is a wardrobe mainstay. Wear it under a blazer and you’ve got yourself a polished work look; style it with jeans and roll up the sleeves, and it’s suddenly ready for weekend gallivanting. It’s been everywhere on this season’s Spring runways, too—reworked with sheer sleeves at Sportmax or with a fringe trim at Burberry. But while the crisp top adds a dash of refinement to any ensemble, leave it to a trendsetter such as Hailey Bieber to give the piece a cooler, more unexpected twist.