A navy and white plaid long sleeve shirt and a white crew-neck t-shirt are the kind of a never-failing casual look that you need when you have zero time to plan an outfit. Hesitant about how to round off your outfit? Rock a pair of black leather chelsea boots to amp it up a notch. So if you're looking for an ensemble that's seriously stylish but also feels entirely spring-appropriate, this one is great. As a 30-something Millennial man, you want to start dressing like a grown man. If that's the case, outfits like this prove useful as a source of inspiration.