This semi-casual pairing of a black leather shirt jacket and a light blue short sleeve shirt is super easy to pull together without a second thought, helping you look amazing and prepared for anything without spending a ton of time searching through your wardrobe. Feeling creative? Break up your outfit by wearing black leather double monks. So if you're on a mission for an ensemble that's dapper but also totally spring-appropriate, this just might be it. As a guy in his thirties, you probably want to start dressing more maturely. That's when inspiration like this is very useful.