Personally, I can live sub-zero temperatures. After all, people have been riding normal bikes in normal clothes all over the world for over 120 winters. The winter wind in Copenhagen, however, is a pain in the stylish ass. When it's a headwind, anyway. Tailwinds are a treat. The wind chill makes the temperature plunge, even before you start propelling yourself through the wind and increasing the chill. There isn't much else to do but muscle on through.