Michael Black wrote:

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And your "Pro-Gore-Tex" isn't a religion?

No, it's based on facts. It's like evolution versus creationism.

I'm using "Gore-Tex" loosely though, it could be one of several other
waterproof, breathable membranes. I've had garments with several
different types, and all work pretty much the same. Gore-Tex tends to
work better because they've been refining it for so many decades,
working out the kinks in terms of reliability and longevity.

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, I'd let the rest of
the design features (and cost) of the garment or footwear determine
which one to choose.

For full grain leather boots you can achieve water-proofing with a
product like Sno-Seal which closes all the pores in the leather, but it
effectively stops any transfer of moisture. For other boots (fabric,
split grain leather, or Nubuck, you definitely want to have some sort of
waterproof breathable membrane if you're going to wear them in wet
weather, expect to step in puddles, etc.

In any case, the bottom line remains the same when buying walking
(hiking) boots. First look for the necessary design elements which a

1. GORE-TEX® lining (or other breathable waterproof membrane lining) for
breathable waterproofness (nearly all mid to high end boots have this).
NEVER buy hiking boots that lack a breathable waterproof membrane lining.

2. Vibram® outsole for best traction (cheaper boots may have a lower
grade outsole).

3. Stitchdown construction (not just glued) for durability (very rare
except on extreme high end).

4. Full-grain, all-leather upper (not split grain, not "nubuck") for
support and durability.

Once you find all the boots with the necessary design elements you begin
to narrow down your choices based on other factors like fit, aesthetics,
price, etc..