Tights on clearance at Wally World.
Most of you are now going "Tights? Huh? She's not girly enough to wear tights!"
Allow me to educate you, my friends, and you Manly Men, yes, you, over there shivering like a chihuahua in a room full of Chinese fry cooks, you might want to pay attention to this as well.
Women's pantyhose and tights are not for fashion. Unless you're dumb enough to wear a skirt and nothing else over them, pantyhose and tights are some of the warmest things on earth.
No, really. Worn under jeans, pantyhose will keep you nearly as warm as long johns. Tights will keep you slightly warmer than pantyhose, due to the difference in the fabrics.
Now, if you layer pantyhose, then socks, then long johns, then jeans, well, your legs and feet will be toasty warm when it's chilly out, and your movement won't be restricted any more than it is by just long johns. Double your warmth, same great flexibility.
Tights, again, are even a smidge warmer.
I'm a wimp about the cold. When it hits the fifties, I start layering. I do not like the cold, at all. Ever. Unfortunately I have had some time to learn the methods of keeping one's cookies from freezing off.
And, in the absence of my beloved Carhart coveralls, which just wouldn't work trying to ride, at least not while trying to teach Monkey things, I will use many methods of keeping warm.
Pantyhose/tights (sometimes more than one pair) under long johns, under jeans. A-shirt under thermal shirt, under sweater, under jacket. Layered socks (up to two pairs of anklet socks under thick work socks, inside my insulated boots. Thank you Rockies, for making insulated slip-on cowboy boots.) Now I just have to remember to get my Carhart stocking cap the next time I'm home, and pick up a new pair of insulated work gloves, and I'll be good to go for the really cold times to come.
Don't look at me that way people, nature didn't give me much insulation, so I have to provide it on the outside!
Besides, I can still kick someone's butt in all my layers, if I have to.
Edit: Another thing I've come to love about my synthetic saddle is that it allows the heat from my horse to travel up through the saddle pad and the saddle, so my butt and the insides of my legs are nice and warm. Everyone else is sitting on stiff, cold leather, while my saddle is still flexible, cushioned, and toasty warm.