At 5 AM, we had 21F with 19 wind chill. I find 2 layers of polypropelene on my torso and poly tights does the trick at thesed temps. Its strange how your perception of cold changes. I've had days where uncovered ears would have frozen off in the high 30s. Today, I ran most of 6 miles with my ear band down around my neck.

4 miles easy, 2 at tempo pace.....the first faster run since my sciatica 14 weeks ago.