Go for a sweater vest and a dark brown cardigan to look polished but not too formal. Why not finish with black leather casual boots for a more laid-back feel? An obvious choice for a younger gentleman!
Dark Brown Cardigan with Sweater Vest Outfits For Men In Their 20s
You can be sure you'll look smooth and stylish in a dark brown cardigan and a sweater vest. Play down the formality of your ensemble by sporting brown leather casual boots. As you're heading into your 30s, you probably want to start dressing in a classier manner. In this case, looks like this are perfect as inspo.