Before I owned this jacket I had a Patagonia down sweater which I love. I only wanted to purchase a new jacket, because my down sweater is a very bright, loud orange.
So I bought this jacket in black. I have a few other jackets (Atom LT, Codetta, Kappa) from Arc'teryx that I have been super happy with, so I thought I would like the Cerium LT.
I did not like the fit. I am very tall, so it is hard for me to find clothing that fits my body well in general. The center-back length is short, but the sleeves are long. I like that the sleeves have a cuff seam at the end. There isn't a pocket in the inside chest like there are on most tech jackets.
I did like the little stuff sac that comes sewn into the pocket. That was great for travel and storage.
It is SUPER light if that matters to people.
The fabric is not water resistant! I know that down jackets are not meant to be worn in rainy conditions, but the fabric saturates so fast and easy.
It honestly wasn't a great insulator either. I thought that the 850 quality down would keep me ultra- warm. I would wear my Cerium and my Atom LT together quite frequently to keep warm.
Some of the down punctured through my sleeve as well. To me that is either a manufacturer defect or a misrepresentation of the product. If this jacket had 850 fill down, there would be no feathers that would have quills that could puncture through the material. I tried to submit a warranty claim and they only said they would repair the hole for me for a fee. I patched it up with some gear tape for the time being (that is some good stuff to have).
I was finally able to buy a new jacket, and purchased the Patagonia Hi-Loft down jacket. It filled with 650 down quality, but the baffles are filled a lot more. The length is excellent and proportionate throughout the jacket. I am able to wear it alone and stay warm. I am very happy I went back to what is tried and true.
Arc'teryx is awesome at making technical gear, but they are not the best out there when it comes to down products.