dave, the wolfskin in not "shower proof." It's great for mist, snow, or just a light rain, but if you set in "the rain" yer gonna get all wet.
It is however, quite breatheable. I wore it this year on some pretty hot days and was relatively comfortable. I wore a light pair of warm weather "long johns" under them (no, not blue....

) and that helped keep me cooler. It's not bad for warm weather.