Try pairing an olive bomber jacket with a white crew-neck t-shirt to put together an interesting and modern-looking laid-back outfit. Want to go all out on the shoe front? Complement your outfit with black leather derby shoes. This look is a goofproof option if you're on the lookout for a great, season-appropriate look. As a guy in his 30s, you want to start dressing like an adult man. In this case, inspiration like this is very useful.