A navy windbreaker and an olive crew-neck sweater are a combo that every fashionable guy should have in his closet. If you need to immediately tone down this look with one single piece, why not complement this look with a pair of beige canvas low top sneakers? It's a smart choice if you're picking out a neat look for unpredictable fall weather. This combination shows that moving from your 20s to your 30s is no reason to shed casual style altogether.