I'd say don't get windstopper, get Nanoflex! I had a demo over the weekend from my LBS and this material is INTENSE! The owner pulled out the armwarmers underneath a water fountain and the water beaded off the armwarmer, and after it, the fabric was dry still to the touch. He grabbed them up from Interbike last week just to show off to all the customers, like myself.

Not only is it water-repellent, but it is fully breathable also. Instead of getting a windjacket and a rainjacket (that both are not too breathable, just depending on venting), you have both with Nanoflex. Yes, it might be more expensive (by $5 for armwarmers over castelli's regular armwarmers,) but it's worth the cost since you don't have to get windgear and raingear separately. Castelli has been demo'ing this gear with the Cervelo Test Team for the spring season. Ok enough talking.. here..

http://www.youtube.com/watch?v=Joa2HbVZ6ZA&translated=1

http://www.youtube.com/watch?v=A1oUqHrVTNw

http://www.youtube.com/watch?v=HQCAO03mCSM

And they are for sale here until the LBS can get them in a few weeks. If you want to know my LBS, it's Big Bang Bikes in Pittsburgh, PA. Not only is he a super nice guy, but he is by far one of the smartest men I know that will give you a fair price on products. Check out www.bigbangbikes.com , I'm most certainly sure that he would ship out product to all of you.

http://www.all4cycling.com/shop/adva...noflex&x=0&y=0