We love the way this classic and casual combo of a white crew-neck t-shirt and tobacco dress pants instantly makes any man look sharp. Rounding off with dark brown leather loafers is the most effective way to inject an extra touch of refinement into this look. As you imagine, this is a cool pick come warmer weather. As a gentleman in his 30s, you want to start dressing more maturely. That's when looks like this are a never-failing option.