The information you seek is here. http://www.xmarksthescot.com/forum/f...at-loss-44833/

Note particularly how the front and rear temperatures respond to movement. Bottom line. Despite ambient temps a kilt is warm as can be if the wind isn't blowing or if you aren't moving around. Once you introduce air movement the advantage of trousers with their trapped air space is more apparent.

That being said, I regularly go for all day hikes with snow on the ground and my wool 5-yard hiking kilt does just fine. I have never felt that my anterior regions were colder than my posterior ones.