This off-duty pairing of a navy shirt jacket and grey sweatpants is very easy to put together in no time flat, helping you look awesome and ready for anything without spending a ton of time digging through your closet. For a classier vibe, complete your look with derby shoes. It's is a smart choice when it comes to a neat look that transitions easily into fall. A wonderful getup as you shift into the next decade of your life, your 30s.