My favoured cool/cold weather deck boots are these sheepskin ones:
I bought them last century in South Africa, and they have proved their worth in Greenland, Fiordland, Newfoundland and winters in Northland. Without socks. I have had them re-soled but apart from that they soldier on in spite of so much wear, never even requiring any stitching replaced. They are still made and I would love to buy myself a new pair to see me out, especially as they now go down to size 3 (for the past 18 years I've been clumping around in size 4!), but I can't get the order page on the website to bring up 'New Zealand'. I can highly recommend them, to anyone who can get the order form to work. They are much tougher than Ugg boots and have reinforcement at the heel - it's this that keeps them going. A spray of waterproofing every now and then makes them real seaboots.
Edit: writing this reminded me to try contacting the makers again, and this time I got a response! An early Christmas present for Annie appears to be indicated!