Ski or snowmobile bibs... like Arctiva brand....

 

Regularly ride into the 20s and though I used to think them frivolous, I have grown quite fond of my Gerbing liner and gloves. So far no desire for the pants but have pondered the heated insoles. Usually just wear jeans and chaps although have been pondering getting leather pants for the cold days.

 

Personally learned a long time ago to have good leather,jacket, chaps,hat,gloves and boots.With or without a windshield if it's cool enough wear neck and ear protection.Experience is the best teacher, you get cold address it.Be comfortable no matter what it takes.Nobodies policing what you wear if they are tough Chit!!!!

 

I use Wall insulated bib-overalls. Got them at WalMart for $50.

 

I do have all the leather you mentioned.

Also use the W&S electric jacket liner and gloves.

Trying to pick between textile over pants or leather over pants for winter use. Not sure for safety if one is really any better when/if sliding down the road.
Thought perhaps the textile would be more useful with the zip out insulated liner and also being water resistant. Even though I always have rain gear with me at all times.