As for ePTFE that doesn't use PU, MontBell's Breeze Dry Tec laminate shares that characteristic with eVENT -- although the two are not identical.
I haven't heard much about Montbell's Breeze Dry. Is it an ePTFE membrane? I checked out Mont Bell's website but couldn't see what it was made of. It looks like it is a microporous membrane with similar characteristics as eVent as you mentioned, but little more is said about it. Do you have any more info on it? Have you used it? Thanks in advance. <img src="/forums/images/graemlins/grin.gif" alt="" />