A dark green shirt jacket and skinny jeans are a great outfit to have in your day-to-day casual rotation. For a modern on and off-duty mix, complete your look with a pair of black leather casual boots. A vivid example of transitional fashion, this ensemble is a staple this spring. As you're progressing through your late 20s, you probably want to start dressing more like a mature gentleman. That's when inspiration like this comes in very useful.