A white and black short sleeve shirt and jeans are the kind of a winning casual getup that you need when you have no time. Complement your ensemble with dark brown leather casual boots to completely spice up the ensemble. You see here that just because the mercury dropped below zero doesn't mean your ensembles should get any less stylish. As a 30-something guy, you probably want to start dressing like a grown-up. That's when combos like this are a goofproof option.