If the dress code calls for a casually classic ensemble, pair a blue denim blazer with navy jeans. If you're clueless about how to finish off, a pair of dark brown suede desert boots is a smart option. So as you can see, this ensemble is a really nice idea, especially for transeasonal weather, when the temperatures are starting to drop. If you often wonder how to dress in your 20s, this pairing is a perfect example.