So as you can see, it doesn't take that much effort for a man to look effortlessly classic. Just wear a crew-neck t-shirt with a beige suit and you'll look incredibly stylish. A trendy pair of charcoal work boots is an effortless way to inject a sense of stylish nonchalance into your getup. This getup is everything for those warmer days of spring. This outfit illustrates how 30-year-old men kill it in the fashion department.