Prove that you do casual like a style pro in a tan crew-neck t-shirt and navy jeans. Clueless about how to complement your outfit? Finish with a pair of dark brown leather brogue boots to kick it up a notch. No doubt, it's easier to work through a roasting hot summer afternoon in a fresh ensemble like this one. This getup shows that well into your 30s your sartorial options are pretty much limitless.