If you don't like being too serious with your combinations, consider teaming a navy puffer coat with a crew-neck sweater. A trendy pair of black leather derby shoes is the simplest way to infuse an extra touch of sophistication into your outfit. So as you can see here, it's a neat, not to mention spring-friendly, combination to have in your transeasonal rotation. In your thirties, you probably want to start dressing like a grown man. In this case, ensembles like this are perfect as inspiration.