Originally Posted by
mountain_man_mike
I came into a stock of Climashield that I have been very happy with and it's similar (not indentical, but similar) to Primaloft.
The Climashield Apex comes in 2.5 oz. per yard and 5.0 oz. per yard with a clo factor of 2.1 for the 2.5 oz. and 4.1 for the 5.0 oz. respectively. Two layers of the 2.5 oz. gets you roughly to that 20 degree mark, so my mind is going towards one layer of Primaloft at 6 oz. per yard getting you to that 20 degree area.
I have not used Primaloft, but using the "similar properties" rule...