Box pleats and winter

[Angus]

I have read that they are very light, does this mean they blow around more than say a 4 yard knife pleated kilt?
How are they for keeping me warm in the winter?

I have one and love it( 16oz Cameron). I decided since you asked to take mine out in the wind and see what happend. I walked all over the place, next to buildings, getting in and out of my truck, out in the open and the whole time the most I got it to do was a little "flutter" in the back. Maybee I was just lucky but it performed perty well for me.
Its actually nice and warm, I like it so much I'm thinking bout ordering another one.