Sofia Richie Grainge's favorite outfit formula is no secret. In fact, she revealed it to InStyle herself during a "How I Get Dressed" interview, sharing that the perfect pair of jeans, a classic button up-shirt, and mesh ballet flats are her go-to look. The queen of quiet luxury shared the uncomplicated combination in the above Instagram post, where she added on a black leather woven tote #LTKSpringSale