A navy denim jacket and black jeans are a pairing that every fashion-forward guy should have in his casual styling rotation. If you don't know how to finish off, a pair of black leather desert boots is a good idea. This look is a goofproof option if you're searching for a great, summer-ready look. As a 30-something gentleman, you want to start dressing like an adult man. In this case, getups like this are a real life saver.