When the situation calls for an effortlessly sleek ensemble, consider teaming a long sleeve t-shirt with charcoal check dress pants. Introduce white and black low top sneakers to the equation to make a dressy getup feel suddenly fresh. This getup proves that in your thirties you have a wide range of outfit options.
For a look that's worthy of a modern fashionable guy and casually smart, rock a long sleeve t-shirt with an olive suit. You could stick to the casual route with shoes by rocking a pair of white and black low top sneakers. If you've reached your 30s, pay attention to outfits like this to take a more mature direction in your personal style.