As do I, I’m a Patagonia man, myself. I was just saying that wool will keep you warm. Edmund Hillary wore wool as a key part of his layered clothing system on Everest, including underwear, shirts, and sweaters, made from materials like Shetland wool on his historic 1953 ascent of Mount Everest, after all, and most all early Everest climbers wore wool.
If I’m on a short day hike I might wear down, but I’ve had enough horrible experiences with wet down that I rarely wear it.
I’ve had hundreds of days when i had to wait for the train on a cold platform. Down rocks. I also mostly skied in down, where its comfort and light weight were appreciated.
I had a wool coat as a teen. I hated that coat. I bought a nifty wool cloak as a young adult. It was fun to wear, but it was heavier than less warm than alternatives.
I’m really surprised Hillary didn’t wear fur, honestly.
But i just researched it, and he wore down, as well as wool. 
Clothing Layers
Hillary wore multiple layers, many of which were made from or lined with wool, including a sweater that was made solely from the neck area of Shetland sheep, spun into the finest of yarns. He also wore a down jacket manufactured by a French company called Alpcan, which manufactured duvets and sleeping bags and applied the technology and theory behind those products and applied them to clothing.
At lower elevations—below Camp 3, which is at about 27,000 feet— Waters wears a wool or synthetic base layer and then layers up with a mid-layer including something like a fleece, topped with a down jacket. For extreme cold, he’ll add a full-body down suit.
That last paragraph is about a modern Everest climber:
If there is a trend in mountaineering equipment since 1953, says Ryan Waters, who owns a guiding company called Mountain Professionals and has summited Everest seven times, it is toward significant improvements in such things as warmth, waterproofing and, above all, weight.
This video by Scilabus (in French but you can get English subtitles) explains the wind barrier effect.