I bought a pair of the Kerrits Wind Pro boot cut breeches and I pretty much don’t want to ever take them off. So comfortable and I can even get away with wearing them to the office on Fridays - if they are clean.
If the temps are below 35/30 though, they need a pair of tights underneath them. And I noticed when I was in 2 point, there’s a breeze…
For riding in the colder temps I have a pair of what I call my riding snow pants. They are quilted with a full leather seat and if I wear long underwear under them they would cease to be the limiting factor in cold weather riding. My fingers get too cold below 20.