A dark brown shearling coat and charcoal wool dress pants are among the fundamental elements of a smart man's closet. On the footwear front, this outfit is complemented really well with brown suede derby shoes. Needless to say, this look is the answer to all of your wintertime dressing woes. As a man in his 30s, you want to start dressing with more sophistication. If that's the case, getups like this are perfect as inspiration.