A navy long sleeve shirt and jeans are a savvy ensemble worth integrating into your current casual fashion mix. Wondering how to complete this look? Finish off with a pair of tobacco suede derby shoes to dial it up. It's a viable choice if you're figuring out a cool ensemble for unpredictable fall weather. As you're getting to your 30s, you probably want to start dressing like an adult. If that's the case, combos like this are ideal as inspiration.