When I was in my early 20s and more concerned about style, I lived in Minneapolis and refused to wear boots...and always wore open toe shoes. That was nearly 50 years ago and I still pay for those frostbitten big toes.
I finally tried Ugg Ultra mini boots and Tasman. I wear them as slippers. It's 21 degrees outside now, my thermostat is set at 66, and my toes are comfortably warm. When it's really cold, I wear a pair of socks with them. I replace the Ugg insoles each fall. They're now 3 years old and still look like new.