Want to inject your menswear collection with some effortless dapperness? Pair a blue denim shirt with navy jeans. Introduce a pair of brown leather derby shoes to the equation for an instant style boost. As you can see here, it's super easy to look awesome and stay warm when colder weather comes, thanks to this ensemble. Those who wonder how to sport smart outfits as you make it through your 20s, this combination should answer your question.