A navy wool blazer and a tan wool turtleneck will add sophisticated style to your day-to-day outfit choices. Puzzled as to how to round off? Complement your look with black leather low top sneakers for a more laid-back finish. So if you're scouting for an outfit that's dapper but also totally season-appropriate, this is it. Wear this pairing to showcase your maturity as a 30-year-old guy.