Opt for a tan fair isle crew-neck sweater and a light blue chambray long sleeve shirt to pull together a neat and relaxed getup. Hesitant about how to finish off this outfit? Rock a pair of brown leather casual boots to kick it up a notch. While it can be a bit of a conundrum to stay on-trend in subzero temps, it's combinations like this that prove it's totally possible. Sleeker looks like this look handsome on 30-somethings.