You've heard of business casual, but smart casual is quickly replacing the traditional 9-to-5 uniform. In fact, it's becoming it. Smart casual style is all about crisp, stylish pieces that work just as hard at dinner as they do in the boardroom, much different from the stiff and boring officewear we're used to. You still can't go wrong with a button-up shirt and pants, but these chic picks infuse personality into your wardrobe. Think tailored trousers with a simple tee, clean sneakers with a midi dress and even yoga pants with a blazer.