Well the cold weather is here and its that time again where we start bundling up in our layers.

I've been wearing my two layers of wool and a windbreaker jacket and I was sweating when I would get to work. So I opened up my armpit air vents to hopefully reduce the sweating. It worked a bit.... so I just would leave them open....as the days went on, and temps dropped I started getting REAL cold and I couldn't understand why my chest and back were just cold (as wool usually keeps you wet but warm) Anyhow, I noticed the other day the vents were wide open (i had them open for so long I had forgotten about them). I decided to close them up fully (temps are now -10 C).
The result:

I was still sweating just as much.
The cold could still find its way inside through the little spaces between jacket and gloves etc...
But I was warm....wet...but warm.

Bottom line: Arm pit vents are okay up until a certain temp. say 0 to -3 range..beyond that, I found it was better to keep the vents closed.

Just wanted to share my cold air venting story.

I can't wait for spring to arrive though.