I am looking for opinions/reviews from users of Marmot Essence jacket (some new 2.5 layer laminate). The specs say it's 164 grams (<6oz).
I love my current Arc'teryx Gore-tex Paclite shell (320 grams) but it is twice the weight, which gives me a big pause. Considering that a shell jacket is a piece of gear that stays in the pack most of the time and is always with me, 5-6oz savings is significant.
Yet, I am hesitant to to replace the Arc'teryx shell, since it served me so well in several wet and cold weather situations. I am a little doubtful of any breathability claims: when exercising hard I sweat so much that I don't believe any membrane is going to help. Yet, I have been in a couple of cold-ish situations and wore Gore-tex for hours hiking and carrying a pack and was reasonably comfortable. Come to think of it, it's usually either a rain-snow mix or cold mountain thunderstorms that my shell comes out. Also as an outside layer in cold and windy situations in camp.
Would super-thin 2.5 layer fabric work as well? Is it as wind resistant? Would it fit as well? I want to go light, but not stupid light.
To make long story short, keeping the ultralight angle in mind, is Gore-tex worth it? Arc'teryx shells are beautiful fit and all, but they also make great backpacks that weigh 3.5kg…
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A side note. I have a pair of Marmot Precip full zip pants, 8 years old (falling apart, but still usable). I'd say this laminate is even more waterproof even than Paclite. Breathability of these pants is unimportant, since I just open side zippers to dump heat. I wish the current Precip model was as light as the old one (300 grams vs 370). I have not found anything substantially lighter yet.

