This combo of a navy duffle coat and dark green corduroy dress pants can only be described as ridiculously sharp and classy. Let your outfit coordination savvy really shine by rounding off this look with brown leather oxford shoes. On not so cold days, you can wear a variation of this summer-to-fall outfit and look absolutely awesome. So if you need outfit ideas on what to wear as you get into your 30s, this combination is definitely worth saving for later.