This casual pairing of a red plaid blazer and blue jeans is super easy to throw together in seconds time, helping you look on-trend and ready for anything without spending too much time going through your wardrobe. And if you wish to immediately up the style ante of your ensemble with a pair of shoes, complement this outfit with brown leather tassel loafers. As you can see, this getup is a really smart pick, especially for awkward fall weather, when the mercury is dipping. As a 30-something gentleman, you probably want to start dressing like an adult man. In this case, inspiration like this comes in useful.