It's cold and rainy out and it will continue to rain for the next four days. I am so glad I am wearing the Lululemon Dog Runner Pants today. Water rolls right off the top layer of the pants and the inner liner is a pair of stretchy leggings. Kept me dry all day despite heavy rain.
Two weeks later:
I sat on a wet seat and did not realize it until I got up and felt that my butt was sort of wet and cold when I got outside. This is not completely waterproof.