Seriously stylish yet functional, this outfit is comprised of a tan wool turtleneck and navy plaid chinos. Tap into some David Beckham stylishness and add tobacco suede casual boots to your getup. This getup is an obvious choice when it comes to a neat look that will take you from summer to fall. As a 30-year-old guy, you probably want to start dressing more professionally. In this case, combinations like this are a solid bet.