erik.wilsh486558wrote a review of Montane Featherlite Pant - Men's on March 8, 2010
I have a pair of these, and use them a lot. In the summertime I use them as windbreakers. In the wintertime while doing xc skiing I use them over thermals down to -10 C without problems. They are lightweight, comfortable and easy to adjust.
However I use them primarily as windbreakers. They will withstand 10-30 mins of moderate to heavy rain, but after that you will be soaked.