Peter Clinch wrote:
SMS wrote:

For "eVent" (used in the Rab Momentum) versus Gore-Tex, Gore-Tex moves
moisture out through the membrane a tad faster (based on tests), but
both are equally waterproof. I would not choose one over the other based
on the slight breathability advantage of Gore-Tex,

But eVent has been tested as a fair bit more breathable than Goretex,
because they avoid the PU smear over the microporous membrane that
restricts Goretex's breathability.

The test I saw the video of on-line showed Gore-Tex being slightly more
breathable, but I'm sure there are tests that show the opposite as
well--depends on who's doing the testing. It doesn't really matter which
one, though I've never seen eVent on boots, only on garments, while
Gore-Tex is widely used on shoes and boots.