A navy suit and a dark brown turtleneck are absolute mainstays if you're putting together a semi-casual wardrobe that holds to the highest sartorial standards. Add black suede loafers to this look and you're all done and looking awesome. Rest assured, this ensemble will keep you warm as well as looking seriously stylish in this weird fall weather. As you get into your 30s, you probably want to start dressing like an adult man. In this case, inspiration like this comes in very handy.