I wore a Swanni over a Pendletons' shirt (also wool) and had a my Swedish Snow Smock, unproofed in any way, over the lot and was stood in a downpour for an hour at least talking to a mate. I didn't get wet or cold. What you wear underneath is just as important as the shell itself. Goretex is pants, ventile is much better. If you want to be unbeatably waterproof and breathable, go nekkid!