Consider pairing a navy turtleneck with navy jeans if you wish to look cool and casual without putting in too much time. Want to go all out in the footwear department? Complete this ensemble with a pair of dark brown leather derby shoes. So if you're looking for a kick-ass getup that will take you from winter to spring, this one fits the task well. This ensemble shows that well into your 30s you have a wide array of sartorial options.