I have a neon lime/yellow cycling windbreaker that I wear over layers in the winter. When it's cold (low 40s) I wear a couple of shirts underneath, with one being a long sleeved UnderArmor shirt. If it's warm (50ish), I just need a cycling jersey under the jacket. I recommend layers. My only complaint is that like typical windbreakers, it doesn't breath all that well. I just deal with the sweat. YMMV.