Apologies to Snow White and the Bears for the mixed metaphor…
After several “fails” in overdressing, the combination I’ve been wearing outside the last few runs in the 30s worked well in the low 20s. However, I admit it probably still could have been a little lighter to minimize moisture buildup. The vest is a great tool, but hard to walk out the door in when it’s so cold.
2) L/S compression shirt
3) running tights
5) L/S fleece (here’s what I’d swap out for a vest – but a S/S shirt under this might have worked better)
7) lightweight gloves
Low wind makes this calculation so much easier to figure out right. Wind goofs everything up – unless you can keep it out without holding in too much heat. RW has a pretty good web app that can get you in the ballpark depending on the weather conditions.