Classic folds such as the straight-edge or ... A well-fitted three-piece suit with a vest, high-waisted trousers, a pocket square, and a fedora will create an authentic 1920s look.

As you’ll see below, there’s perhaps no easier way to level up a look—be it a T-shirt and jeans or a suit and tie—than by adding a vest to the mix. Here’s how to wear a sweater vest like ...