If you're on a mission for a casual yet on-trend ensemble, consider teaming a black and white varsity jacket with black skinny jeans. White leather low top sneakers are guaranteed to infuse a dash of sophistication into your ensemble. When leaves are falling down and temperatures are dropping, you'll appreciate how great this outfit is for in-between weather. And if we're talking casual clothing for 30-year-old gentlemen, this ensemble looks cool on almost any guy.