For comfort dressing with a twist, dress in a green crew-neck sweater and a white long sleeve shirt. A trendy pair of dark brown leather loafers is an easy way to inject an air of elegance into your look. If you want people to see maturity in you, an outfit like this is a never-failing option.
If the situation permits casual dressing, you can easily wear a green crew-neck sweater and a white long sleeve shirt. If you want to immediately dress up your outfit with a pair of shoes, why not complement this getup with a pair of black leather oxford shoes? A safe bet combination appropriate for gents in their thirties.