Pairing a red and navy horizontal striped crew-neck sweater with khaki cargo pants is a safe and stylish bet. Give a different twist to an otherwise all-too-common ensemble by finishing off with a pair of dark brown leather derby shoes. So as you can see here, it's a knockout, not to mention season-appropriate, ensemble to keep in your transeasonal sartorial collection. A vivid example of how to dress with style as you get into your 30s.