This smart combination of a charcoal blazer and dark brown jeans is extremely easy to pull together without a second thought, helping you look stylish and ready for anything without spending too much time combing through your wardrobe. For a more sophisticated feel, complete your ensemble with brown suede loafers. When it comes to dressing for awkward fall weather, nothing beats a neat look that will keep you toasty and looking your best. As a guy in his 30s, you probably want to start dressing like a grown-up. In this case, combinations like this are perfect as inspiration.