A navy gilet and light blue jeans are a good combo worth integrating into your current casual arsenal. When not sure as to the footwear, complement your getup with a pair of white leather low top sneakers. So as you can see here, it's a kick-ass, not to mention spring-appropriate, look to have in your seasonal rotation. As you turn 30, you probably want to start dressing like a grown man. That's when combos like this are a foolproof option.