Consider wearing a beige wool turtleneck and white jeans for a hassle-free look that's also pulled together nicely. You could perhaps get a bit experimental on the shoe front and lift up your look by rounding off with black leather casual boots. During the winter months, when warmth is critical, it can be easy to surrender to a less-than-stylish outfit. However, this outfit proves that you can actually stay snug and remain equally stylish during the winter months. No doubt, a good pick when it comes to fashion for gents in their 30s.