Pairing a navy waistcoat and charcoal check wool dress pants is a surefire way to inject style into your wardrobe. Dial down the dressiness of this getup by rocking slip-on sneakers. So as you can see, this look is a really good idea, especially for awkward fall weather, when the mercury is dropping. This combination proves that in your 30s your sartorial options are in no way limited.