This stylish getup is easy to break down: a white and black print crew-neck t-shirt and black jeans. On the footwear front, this getup pairs wonderfully with red low top sneakers. When it comes to dressing for unpredictable fall weather, nothing beats a cool ensemble that will keep you snug and looking your best. Casual outfits for guys in their thirties aren't actually that hard, as you can see here.