This casual combination of a green field jacket and black chinos is perfect when you need to look casually stylish but have no extra time. To give your outfit a smarter finish, why not complete your look with casual boots? When leaves change color and fall is in full swing, you'll love this outfit as your go-to for transeasonal weather. As a guy in his 30s, you probably want to start dressing like an adult man. If that's the case, looks like this are a winning option.