A grey knit wool turtleneck and light blue jeans are essential in any gentleman's versatile casual wardrobe. On the shoe front, this outfit is rounded off really well with white leather low top sneakers. In winter, when warmth is key, it can be easy to settle for a less-than-stylish getup. But this getup is hard proof that you totally can stay comfortable and remain stylish at the same time during winter. Overall, an ideal demonstration of casual style for guys over 30.