Arc'teryx Cerium LT Hooded Down Jacket

Priced: $349.95 Rated:   - 5 stars out of 5 by 11 reviews.
Arc'teryx Cerium LT Hooded Down Jacket
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Color: Nighthawk
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Arc'teryx Cerium LT Hooded Down Jacket -

Cerium is the most abundant rare earth metal, decomposes slowly in cold water and rapidly in hot water. The Arc'teryx Mens' Cerium LT Hooded Down Jacket is not quite as prevalent as its namesake, but does slow your decomposition in cold weather. The combination of 850-fill European goose down and strategically placed Coreloft insulation keeps you warm whether you wear the Cerium alone or under a hardshell when you're confronted with a winter tempest most storm chasers avoid.
Bigger numbers are fun when it comes to betting odds and down insulation. A higher fill-power down, like the 850-fill used in the Cerium, refers to how much space a single ounce of down occupies. The more space taken up by the down means more air is trapped between the fibers. Trapped air creates a barrier between warm air from your body and cold air in the environment, so you stay warm when it's cold outside. Taking this logic one step further, if one ounce of a certain down takes up more space than a different type of down, it stands to reason you'll need less of the 'bigger' down to keep you warm, thus reducing the weight of your jacket. In essence, this jacket's high down fill makes it both light and warm.
Since down doesn't maintain its warmth when it gets wet, the folks at Arc'teryx placed synthetic insulation in the spots that are most likely to get a bit damp. Still, while Coreloft insulation does resist moisture better than down, and an ominous drizzle won't leave you a cold, soaking mess, it's best to pair this with a waterproof shell if you know the weather is coming.
This superlight hooded jacket comes with its own stuff sack so you can easily bring it along and so your pack stays organized. The same 850-fill down fills the low-profile StormHood so your melon stays warm. (Mom was right—if you keep your head covered, you'll stay warmer.) Two zippered hand pockets hold your keys and phone, trail map and candy, or your partner's ID and lip balm.


  • Trim fit, hip length


  • Lightweight Airetica shell, 10x20D ripstop nylon


  • Coreloft synthetic insulation, 80 and 100 g/m2
  • 850-fill European goose down in core and hood

Weather and Wind:

  • DWR treated


  • Low-profile StormHood
  • 9.7 ounces (M)
  • Includes stuff sack
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Review RatingNumber of Reviews

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Arc'teryx Cerium LT Hooded Down Jacket Reviews:

Positive Reviews:

I purchased this jacked as a replacement to the Mountain Hardwear Nitrous jacket. Yes, It was about a hundred bucks more expensive but worth every penny. I returned the Mountain Hardwear jacket after stiching began pulling out around the elastic cuff after the first camping trip. Big time disappointment. I'm 5'11" , 155-160 pounds and purchased a medium. This jacket is what I would call an athletic fit (much slimmer fitting than the Mountain Hardwear jacket in the same size). For me, this is the fit I want out of this jacket though. You can put a sweatshirt under it, but it's really pointless. It's much warmer to just wear a tee or long sleeve thermal and let the 850 fill do it's job. I've found the temperature range of this jacket to be simply incredible. This jacket is comfortable to wear while sitting at my office desk (usually about 70 degrees, but I get cold easy at work) and has kept me very comfortable outside with wind chills around zero with just a tee shirt as a base layer. The jacket seems like it would be prone to rips as it's "thin" feeling, not the case! I've had several dogs jump on me and not one claw has punctured the material. It's very strong, very wind proof, plenty water resistant and ultra packable. I have also noticed that very few feathers fall out like so many other down jackets do, especially the Mountain Hardweat Nitrous I had to make one complaint, it would be the stuff sack. I like when you can just stuff into one of the front pockets, but this jacket has it's own little removable stuff sack that's oddly tied into a pocket. It's not much of a complaint, but all I could think of. All-in-All...get this jacket and don't look back.

Matt E. at on 12/08/2013

I read another reviewer who said this jacket was as warm as his old North Face Nuptse. Well I tried this jacket on at Valhalla Pure in Nanaimo, BC and couldn't believe how light it was. I bought it, thinking there's NO WAY it's gonna be as warm as a Nuptse. It actually is, and weighs about a third. I've worn it for late night hikes in -15C windy weather just with a t-shirt and very thin merino wool sweater under, and I was toasty warm. I've also worn it a downpour for about an hour. When I got home I thought the inside would be wet, but it was dry as a bone. I showed it to my son's friend who works outside in Ft. McMurrary Alberta, and he went and got one. He said he was wearing it in -6C the other day with just a t-shirt under and said he was toasty warm. I don't know how they did it, but it's just an incredible jacket. I've used the hood too, which is so comfy and warm. I'm 6'1" and 185 pounds, average build. I got the large and it fits great with something thin under it. Anything bulky under and it doesn't feel right. Another reviewer mentioned that the less you wear under it, the warmer it is. I think it has something to do with trapping warm air, and it's really true. Anything thin and thermal under it are all you need.

makeyourfaith at on 12/15/2013

I am 6'1'' and about 165, I ordered a medium and it fits exactly how I wanted it to. Its snugish against my body and the arm length is perfect. It goes to right below my waist and thats the fit I wanted. The 850 down fill is crazy warm. If you layer with it, its going to keep you warm in any weather mama nature has to throw your way. Dwr coating is nice but I can tell that after a long while it would get wetted out fast. The think I like the best is it is amazingly light. Weighs almost nothing and compresses well. The one thing I wish it had was another pocket somewhere above the waist so if you wear it belaying you could still have a pocket or two to use. Besides that I am stoked on this jacket.

Tyler Thunell at on 12/22/2013

So now I have the thorium ar in medium and the cerium lt in a large. I'm 5"10 175 with broad shoulders and chest. The large cerium fits a little bigger than the medium thorium and is definitely not trim in that size for my weight. Lots of room to move and I can layer under it. I like everything about the cerium better accept the zipper. It's honestly really cheap and you can tell they saved on costs there. I'm debating which one to keep but leaning towards the light cerium. It's literally half the weight of the thorium even in large. Another note is the chin piece in the thorium comes up higher to cover more of your face. I don't know, both are awesome and if it wasn't for that cheap zipper with no flap then the choice would be simple.

Tester at on 12/11/2013

I have put it through some very cold 5 degree high wind temps with snow etc. Wearing a T shirt under it, and couldn't feel the cold! The hood is an awesome fit, I bought Large. I am 5'9" 185 lbs, athletic build, broad shoulders. It's a "good snug" fit, I can fit a 100 weight fleece under it and still be comfortable, but you don't need it. Understand their fit guide, this is Alpine fit, which means runs smaller. It fits very very similar to the Atom LT/SV. If you can afford it, get it! Arcteryx lives up to their name with this one.

arcey at on 12/29/2013

I got one of these in a ladies and loved it so much that I bought one for my pops! As I've already written a review on the lady version --> so I'll keep it brief here. My dad wears this while teaching his geologic field methods course here in SLC. It is freezing balls out here right now, and standing around helping students learn to take geologic measurements for hours on end doesn't tend to make things any warmer. Since he put this on, I haven't actually seen him take it off yet, and says he's never been warmer. Pictures to follow soon.

Cory D at on 01/10/2014

I gave this as a gift, but from playing around with the jacket I could tell how nice it is. 850 down is extremely warm, yet the jacket isn't too thick or puffy. Could wear this under a shell, or your outerlayer while skiing. The DWR coating is water resistant but if you're going out in a storm make sure to grab a waterproof shell of some sort, this jacket won't stay dry in a downpour. All fits into a stuff sack in the left pocket. Compresses super small and is great for traveling and backpacking. Highly suggest this jacket to anyone.

Adam Rosenberg at on 12/28/2013

I'm 5'10'' and 160lbs. My chest is 39in and all other dimensions fit the size chart for medium very well. But it's just too tight on me. I love this product so much that it's light and warm. But I have to return this. I feel sad that I cannot have it before the vacation comes.

awa5662710 at on 12/11/2013

I wore this jacket yesterday in 20 degrees with just a base layer and stayed toasty. Fit's great and is very light. I'm not having issues with feathers coming out like some of the other customers.

Tuan Chu at on 01/08/2014

True to Arc'teryx fit, great for tall slender dudes. Would work well as a layering piece or on mild days around town.

Leslie Byers at on 01/13/2014

Neutral Reviews:

Overall the jacket seems to be decent quality. Its warm in front and on the sides; the hood fits well. Mine does shed down, but it doesn't seem excessive. The feathers do come right through the face fabric though, not just the seems. My big complaint about this jacket is that the baffles in the back are very underfilled with down. The baffles in front and on the arms are well stuffed and puffy, but a lot of the baffles that span across my back have such a small amount of down in them they are completely "deflated" and feel like they're almost empty if squeezed/massaged. The back definitely feels colder and this is disappointing considering the price of this piece and the reputation of Arc'teryx. I tried calling the manufacturer to see if this was normal and I talked to a female on the phone who was surprisingly unhelpful. Also, I'm 6'2" and 170 and while the sleeves are just barely long enough and torso length seems almost too short, the jacket fits surprisingly roomy considering its supposed to be a trim fit. Hope this helps for anyone who is thin.
Update: After practically living in this thing for the past month I have more comments. I've been climbing extensively in this jacket in Red Rock and Joshua Tree. The face fabric has held up great to frequent use with a pack and harness, and inevitable abrasion on rock while climbing. I have jammed the sleeves in cracks numerous times and done a few chimney moves in the jacket. There is no visible wear at all.
It does continue to shed feathers every day I wear it, but I don't think its of much concern. If the back baffles weren't so under filled I would rate this jacket a perfect 5 stars.

Philanthro at on 01/09/2014