In reply to Darkskys:
The MX is a lush jacket. The fit (if you've tried one) I'm sure you will agree is amazing, plus the trim and long arms do work very very well. I find that the all the pockets are a bit pointless tbf, just two hand pockets would be enough. The cuffs can be a pain as they are quite tight which I find can make getting to a watch, or adjusting a midlayer a little difficult.
The hood is pretty perfect although one thing that is a pain is that when you have the face guard open is spreads quite wide and the hood hangs rather loose. I rarely use the hood, but prefer the hoody of the jacket because the collar on the hoodless version is too tight to zip up and horribly ugly and I like to be able to cover my face. The front is almost a little too short for me and I find that it only sits about an inch below the harness and I would prefer it to be a tiny bit longer.
The new material isn't that great either! the older polartec ones (c. 2010) had a much much better durability and resistancy. The fabric now although super soft and supple it doesn't feel as durable. Needless to say I think because of this these also wet out a lot faster. In addition I find with most of Arc'teryx's stuff when it gets really dirty and grubby its nearly impossible to get clean.
Otherwise they are very breathable I've never been overly uncomfortable and nor have I ever been wet in the rain. I normally layer an atom lt underneath which is a fantastic combination when its freezing cold and I find that this helps keep the hood in place and the long sleeves from bunching around your wrist too much. I have layerd it under a hardshell and it works pretty damn well as a technical 'midlayer', basically if you're in the hoolie it fits pretty well under a waterproof too.
If you find you want something a little less insulated, slightly more durable and with less pockets, the Gamma LT is another exceptional jacket with a pretty much identical cut and works very well.
