Most common is just several layers with insulated car hart bibs, a hooded sweatshirt which helps keep snow out of my jacket even without the hood up, and a warm insulated jacket. A baclava and old open face snowmobile helmet with a visor for my head work pretty well. I did wire in a cigarette lighter and have motorcycle heated gloves and vest that I use for long sessions if temp is lower than about -10F. I wear a cheap headlight for backing up but a good backup light on the tractor is next. I dream about a cab and may build one but this works well for me now. I also think I would like to try a back blade and front blower when I get too old to be turning around for hours. The only real operational concern is that the clutch pedal can get slippery and I have to be careful of that in tight spots. I’m thankful to have slipped off it a couple times where it didn’t matter so I know to be careful.