This elegant combo of a dark brown suit and a tobacco turtleneck will cement your sartorial expertise. If you're not sure how to round off, a pair of dark brown suede loafers is a foolproof option. In the colder months, when warmth is critical, it can be easy to surrender to a less-than-stylish outfit in the name of functionality. However, this outfit is a good illustration that you can actually stay snug and remain stylish at the same time in the colder months. Surely a popular option if we're talking fashion for 30-year-old men.