This casual combination of a black denim jacket and white chinos is a goofproof option when you need to look laid-back and cool but have no time to pull together a look. To add a bit of flair to this getup, introduce brown leather chelsea boots to the equation. If you're scouting for a cool outfit that will take you from winter to spring, this one fits the task well. So if you're on a mission for outfit ideas on how to dress as you slip into your 30s, this outfit is a great example.