Anything Gore-Tex. That stuff is junk. You can be waterproof. You can breathable. But you can't be both, I don't care what Madison Ave. says. The only time I've ever had any luck with it was when it was well vented, arm-pit zips etc... What's the point of paying for the laminent, if you still have to carry around all those zippers, or worse... blow them out?
Biscuits