I wear these mocs with at least two pairs of wool socks, one of them knee-length. I also usually wear a smaller pair of shearling-lined mocs inside. They are like other mocs, they work best in weather cold enough to freeze everything. We don't have really extreme weather here, but I've stayed comfortable all day with them at just above zero.
When the weather is cold, but above freezing, it's best to walk on the rocks with any mocs. :grin: I've found, though, that if I'm wearing wool socks inside any mocs which get wet in cold weather, I don't find it as uncomfortable as I imagined I would when I first started venturing out in colonial gear. If I have dry mocs and socks to change into at night, I do surprisingly well. My interest in doing all this crazy stuff is to experience what the old boys did, so I don't wear modern footgear, and accept that I'm going to have cold, wet feet at times, and it's not a deal breaker.
I'll admit to cheating, at times, as I've grown older, for health reasons. If I want to wear my colonial kit and I know I'm going to have cold wet feet all day, I have occasionally slipped a very thin plastic bread storage bag over my wool socks. Then the mocs and outer socks can get cold and wet but my feet do not.
I also have a pair of shoepacks with wool blanket inserts which work very well.
I gave up trying to waterproof any mocs with grease years ago. It never worked for me.
Spence