My understanding is that the vapor transport really doesn't work that well when the supposedly DWR-coated outer layer is soaking wet. As a result, you get condensation on the inside - but the membrane itself is totally water proof (assuming no punctures due to wear and tear). The net result: You get wet and blame the goretex membrane for not working anymore.

Re-impregnate with DWR and you can revitalize a lot of the original functionality.


IMO, there is no perfect solution for staying dry. You have to live with a decent compromise (such as only reasonably damp or just a little wet after prolonged rain). Even the most breathable fabric won't breathe well enough to avoid moisture buildup and condensation, which will degrade the insulating properties of most materials. Give a bit of wear and tear, and neither zippers nor that fancy membrane will be 100% water proof. This is the main reason why I love wool... Given enough time, you will get a little wet or at least damp.