In reply to jackth:
It took me years of ear aches and many buys to find my perfect hat, but never fear I have the answer!
I suffer terribly from ear aches and the cold, and work outdoors in all weathers as well as heading to Scotland for winter conditions. I found the Outdoor research Peruvian hat below so good I bought a second incase they ever stop making them! I’ve had mine for about 8 years now and It still looks Like new.
It feels fully windproof to me, although I’m not sure that’s possible unless it’s made out of plastic? It doesn’t blow off or move under a helmet and is quite thin, yet very warm, if not too warm sometimes. Which is not a bad thing!
The only downside is the style, but who cares when you’ve got a warm head in a 60mph white out?!
I've also recently discovered that wearing a Patagonia RG1 with a full hood under a hard or soft shell hood keeps my ears and head perfectly comfortable, and is a very simple way of regulating temperature if you need to loose heat. In the absolute worst conditions I wear the RG1 hoodie with the outdoor research hat and feel as warm And comfortable as I would in my living room, and not too sweaty !
https://www.outdoorresearch.com/us/peruvian-hat-243546?cat=14,4,402
https://www.patagonia.com/product/mens-r1-regulator-fleece-pullover-hoody/4...
Hope this helps.