This combo of a dark green crew-neck sweater and black chinos offers comfort and confidence and helps keep it low profile yet trendy. And if you want to effortlessly level up your ensemble with one piece, introduce tobacco leather casual boots to your outfit. As you can see, it's super easy to look dapper and stay cozy when cooler weather comes, all thanks to looks like this one. This combination illustrates how to dress fashionably and look good in your twenties.