Jordan Evanswrote a review of Arc'teryx Zeta AR Jacket - Men's on April 23, 2017
Familiarity: I've used it several times
Fit: True to size
I bought this jacket a month ago and so far have really liked it,but it might not be for everyone.
The c-knit material is great for my uses.Already I can tell that it's not as durable as the other 3-layer goretex options from arc-teryx but the feel is amazing.It is light,quiet, and feels great to move around in.I don't think this material will hold up to serious abuse though and it says in the instructions that c-knit is more prone to snagging as well as stains so be aware what you want to use it for.
Overall the fit on this jacket is nice but a bit on the baggy side for an arcteryx jacket,it's noticeably different from their other model as well as other jackets I've tried on in general.It fits more like a trench coat,this means it fits under the butt,has longer sleeves,and it has lots of room for layers while still feeling really mobile.It is definitely more of a performance long distance trekking/walking piece so if you're looking for a slim fit for running or climbing I would look elsewhere . I am 5"11 and 155 pounds with a long lanky build and I find the sleeves on this jacket almost too long in a size medium.To put it in perspective I don't fit mediums in pretty much any other company so keep that it mind if you want a slimmer/tighter fit,this jacket was designed for mobility and layering while hiking/walking,it will probably be too big for climbing or more high output activities.
Overall I'm really pleased with it.I live and trek in the pacific northwest and the combination of the elongated fit,the material,and general quality makes it great for trudging through the rain and exploring wet trails where you need a lot of protection/coverage.