Business Casual can be best described as less formal business wear, with smart casual being a less formal extension of business casual. The section below breaks down the various elements and describes what makes the casual look business or smart: With a smart casual dress code, you do not have to wear a blazer or a sports coat. You can opt for a more casual option, such as a leather or bomber jacket. Darker colors will give a sense of formality to your outfit, even if your pieces tend to fall on the more casual side. Try pairing your jacket with a crisp white t-shirt, a pair of chinos, and some low-top white tennis shoes. This outfit is one of my favorites because of how effortlessly sexy it is while still looking smart and casual. The cropped knitted sweater and tank paired with the pants look so stunning and perfect for date night or a sage green co ord night out with friends.