This casual combo of a white vertical striped long sleeve shirt and light blue jeans is a fail-safe option when you need to look cool but have zero time to spare. Ramp up the dressiness of this outfit a bit by slipping into a pair of brown suede chelsea boots. You can see here this ensemble is also a practical example of dressing stylish in the dead of winter. As a guy in his 30s, you probably want to start dressing like an adult man. That's when combos like this are a never-failing option.