Waterproof and warmth aren&#x27;t usually a useful thing to mix. Because when you really need it to be water-proof you likely don&#x27;t care that much for the insulation (although you do care about wind-resistance), where as when it&#x27;s really cold - it  really makes no difference whether it&#x27;s waterproof or not.<p>I tend to get a light non-insulated (but wind-resistant) shell and a light down-jacket - which in my experience works under all but the most extreme conditions.