Putting together a brown sweater vest and charcoal wool dress pants is a guaranteed way to infuse style into your styling repertoire. For something more on the casually cool side to complement your look, add brown leather casual boots to this ensemble. When you're having one of those bleak autumn days, sometimes only a killer outfit like this one can brighten it up. As you're maturing from your 20s to your 30s, you want to start dressing more like a grown gentleman. That's when looks like this are a surefire option.