It's best if you keep it simple with your waxed-cotton jacket. If you own something from Barbour, you just need to throw on an oxford shirt and a merino wool sweater and be about your business. You'll be warm, dry, and possess a look that won't get you any crap from your stylish friends. Waxed-cotton jackets and sweaters are playing it safe, but it's better to not be soaked than to take a futuristic style risk that doesn't pan out.