For a casual outfit, reach for a white and black horizontal striped crew-neck t-shirt and dark green chinos — these pieces go nicely together. And if you want to easily class up your look with a pair of shoes, add a pair of black leather desert boots to your getup. So if you're looking for a look that's on-trend but also feels entirely spring-ready, this just might be it. Casual ensembles for stylish 30-something Millennial gentlemen aren't actually that hard, as you see here.