Marrying a navy plaid suit and a white dress shirt is a fail-safe way to breathe rugged sophistication into your closet. Add black leather derby shoes to your getup et voila, the outfit is complete. And if you're hunting for a neat outfit that transitions easily into spring, this one fits the task well. As a 30-year-old, you probably want to start dressing in a classier manner. That's when getups like this are a real life saver.