In reply to dannorris: If you are anything like me I boil just doing the skiing in my helly t shirt and that is in -20c , I personally don't have one but my missus swears by them but she doesn't sweat anywhere near what I do .
winter in Norway is cold and dry I have a light weight windproof , a 100 polatec (northface) and a rab summit down jacket and down mits for when you stop to have your butties ............
the locals seem to set fire to anything that will burn when they stop