This combination of a trenchcoat and brown chinos is definitely jaw-dropping, but it's super easy to imitate too. Go ahead and introduce white athletic shoes to the mix for a mellow feel. Gents who wonder how to pull off modern off-duty dressing as you head into your 30s, this ensemble should answer your question.
Brown Chinos with Trenchcoat Casual Warm Weather Outfits In Their 30s
As you can see here, looking seriously stylish doesn't take that much time. Just consider pairing a trenchcoat with brown chinos and you'll look incredibly stylish. Make this ensemble less formal by rounding off with black athletic shoes. Now that's how you keep it casual as a 30-something Millennial guy.