We had an Arctic cold front move into the area bringing with it sub zero temperatures. AM was 21°f. The aftn was -5°f with strong winds. I wore my usual maximum cold weather gear and the visorgogs. It’s weird because at 4 am, at those temps , my visorgogs would be frosted over and my toes would be numbingly cold. But this aftn I rode all the way home with no discomfort in my feet and the visorgogs didn’t fog up. They would start to fog up so I’d uncover my mouth until they cleared themselves up again. I packed the NEOS’s expecting to need them for the aftn ride home. But wearing the snowsneakers and an extra pair of wool socks my feet stayed comfortable. The only thing I can figure is the sun must make that much of a difference. Because at night, anything below 5°f. I’d have to break out the heavy duty stuff. The NEOS overshoes and the Uvex double lens goggles. Those don’t fog up, even with my mouth and nose covered up.