You'll be amazed at how super easy it is for any gentleman to throw together this casual getup. Just a v-neck t-shirt worn with navy jeans. Here's how to dial it up: dark brown casual boots. It's a viable pick when it comes to crafting a well-coordinated getup for awkward fall weather. This pairing proves that as a 20-year-old gent, you have a vast array of dressing options.