You'll be surprised at how easy it is to pull together this classy look. Just an olive blazer and black dress pants. When in doubt as to the footwear, go with a pair of black leather loafers. This look is also perfect if you're on a mission for summer wear to get through a tedious day. As you're approaching your 30s, you want to start dressing more like a mature gentleman. That's when inspiration like this comes in useful.