A white crew-neck t-shirt and khaki jeans are bona fide essentials if you're planning a casual wardrobe that holds to the highest sartorial standards. Finishing off with a pair of red suede work boots is an effortless way to inject a mellow feel into this look. As you can see here, this getup is a really smart choice, especially for unpredictable fall weather, when the temps are getting lower. All in all, a perfect demonstration of off-duty fashion for maturing gentlemen.