A grey overcoat and a charcoal suit are essential in a functional man's closet. Go for casual boots to make a mostly classic outfit feel suddenly fun and fresh. So as you can see, it's super easy to look seriously stylish and stay snug come cooler days, all thanks to combinations like this. As you head into your 30s, you probably want to start dressing in a more sophisticated manner. If that's the case, outfits like this are ideal as inspiration.