Yeah Benny, windproof is the sticking point. Also, I have a very nice Icon Motorhead leather jacket that I use for cooler weather and I want something that'll go under it without making me feel bulky. It would be nice to have the shirt, pants, gloves,etc. all the same.
It seems that they are using their windproof fabric in combination with coolmax (great stuff, I have lots of running gear with it). For example the coolmax is used on the back of a shirt where the wind isn't a factor, thereby allowing for breathabilty?