This combo of a navy trenchcoat and brown jeans is a tested option when you need to look dapper in a flash. Finishing with a pair of derby shoes is a simple way to bring a little fanciness to this look. This combo is a good choice when spring sets it. As you pass the big three-oh, you probably want to start dressing like an adult man. If that's the case, combinations like this prove useful as a source of inspiration.