Want to inject your closet with some casual dapperness? Consider teaming a black denim jacket with a long sleeve shirt. For times when this getup looks too dressy, dress it down by finishing with a pair of black leather low top sneakers. This outfit is also great if you're searching for summertime wear to make a slow day more tolerable. This ensemble illustrates that going from your 20s to your 30s is no reason to stop dressing casually.