A black knit turtleneck and light blue jeans will convey this laid-back and cool vibe. A great pair of brown leather dress boots is the simplest way to bring a sense of refinement to this getup. Warmer temperatures call for cooler getups like this one. As you get into your 30s, you probably want to start dressing like an adult. If that's the case, combos like this are ideal as inspo.