Such pieces as a long sleeve t-shirt and khaki chinos are the perfect way to infuse extra cool into your day-to-day repertoire. As for the shoes, you can follow a classier route with loafers. This getup is also great if you're on a mission for summer wear to make a boring day more bearable. As a 30-something guy, you want to start dressing like an adult. That's when looks like this are a winning option.