For a look that's street-style-worthy and casually neat, pair a navy blazer with navy jeans. Introduce a pair of dark brown suede oxford shoes to this look for a major style boost. So as you can see here, it's an on-trend, not to mention season-appropriate, ensemble to have in your seasonal wardrobe. So if you're on the lookout for dressing tips for gents in their thirties, this outfit is definitely worth saving for later.