Why not dress in a grey wool turtleneck and black vertical striped chinos? As well as super practical, these two items look awesome when combined together. To inject a more laid-back spin into your look, complete your ensemble with dark brown suede work boots. As you're maturing from your 20s to your 30s, you probably want to start dressing like a grown-up. If that's the case, looks like this are perfect as inspo.