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  • Arc'teryx - Cerium LT Down Jacket - Men's - Admiral
  • Arc'teryx - Cerium LT Down Jacket - Men's - Nautic Grey
  • Arc'teryx - Cerium LT Down Jacket - Men's - Cardinal
  • Arc'teryx - Cerium LT Down Jacket - Men's - Black
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  • Arc'teryx - Cerium LT Down Jacket - Men's - Admiral
  • Arc'teryx - Cerium LT Down Jacket - Men's - Nautic Grey
  • Arc'teryx - Cerium LT Down Jacket - Men's - Cardinal
  • Arc'teryx - Cerium LT Down Jacket - Men's - Black
  • Arc'teryx - Cerium LT Down Jacket - Men's - Adriatic Blue

Arc'teryx Cerium LT Down Jacket - Men's


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    33 Reviews


    An ultra-light, packable puffy.

    When it comes to cool, dry climates, the Arc'teryx Men's Cerium LT Down Jacket knows a thing or two about ensuring lightweight warmth and performance. The Cerium LT touts a hybrid construction and slim fit that makes it ideal for backcountry pursuits, climbing in chilly conditions, snowshoeing with the family, or simply for wearing around town.

    More specifically, the Cerium is outfitted with 850-fill goose down in the torso and arms for core warmth, while the synthetic Coreloft insulation in the shoulders, collar, and hem is designed to maintain warmth, despite the fact that those areas often get exposed to moisture—so you stay warm, even when wet. Additionally, this amalgam of insulation is breathable, efficient, and compressible, so you're able to regulate your temperature with little-to-no effort. Meanwhile, the Arato 10 exterior is tenacious and lightweight, and also features a DWR treatment that sheds light moisture should you encounter an unexpected snow flurry.

    Not to mention, Arc'teryx designers really made a name for themselves with to their fine attention to detail—and the Cerium jacket illustrates their expertise. Light elastic cuffs won't pinch your wrists but easily rebuke cold air attempting to permeate your baselayers. A chin guard at the collar prevents unsavory hot spots and chafing, and the included stuff sack makes it easy to pack the Cerium when you're taking off for a week of hiking and climbing, and are in need something to keep you warm on cool evenings.

    • A lightweight, technical insulated jacket for cool, dry climates
    • Wind-resistant and durable exterior offers protection
    • DWR treatment sheds light moisture
    • Down insulation assures lofted warmth
    • Synthetic insulation provides warmth even when wet
    • Hand pockets keep small necessities close
    • Included stuff sack allows for easy packing
    • Slim fit assures unimpeded mobility
    • Item #ARC3663

    Tech Specs

    [exterior] Arato 10 (100% ripstop nylon), DWR treatment
    [Down Composite Mapping] 850-fill European goose down, Coreloft 80, Coreloft 100
    2 zipperd hand
    Claimed Weight
    9.3 oz
    Recommended Use
    hiking, climbing, skiing, snowboarding
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Great lloking and fitting wit flaws.

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium

    The jackets looks great! Bought as a base layer for under my Arc'teryx shell. Form fitting, comfortable, warm, great looking with one major flaw! The down filling consistently coming out of the shell and unfortunately in many cases causing small holes in the shell. The jacket was worn less than 15 times and primarily as a base layer and has 9 noticeable holes that needed to be patched. I have a Marmot and Patagonia which have been put through the ringer with zero issues. They explained their fabric isn't as thick and if you put the feathers back in the hole goes away. I have to disagree. Arc'teryx didn't warranty the jacket charged me a $100 fee for a replacement. I understand even with the best products their can be problems and quality issues. So my issue wasn't that the jacket failed, but as a long time user of Arc'teryx products, especially ski gear, this jacket should be covered under warranty. Just have to think twice about whether the premium price is worth.

    Good jacket, not very warm

    • Familiarity: I've used it several times
    • Fit: True to size

    Quality jacket. Extremely light and packs up small. Used for a couple backpacking treks in winter. Not warm at all. My synthetic 60$ ripped mountain hardware is much much warmer. Returned.

    Quality Jacket

    • Familiarity: I gave it as a gift but have feedback to share
    • Fit: Runs small

    Got this for my dad and he loves it. He was looking for a medium "puff" jacket with no hood and this fit the bill perfectly. Can't go wrong with Arc'teryx! It is a fitted jacket though so if you want to layer - I would size up.

    Excellent Jacket

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: Medium

    Love this jacket. Very warm and packs great. I have had no issues with the down coming out. Little tight around the chest/armpits, but that is the make of the jacket so cannot really complain about that. Wife loves the Admiral color. Highly recommend.

    great jacket

    • Familiarity: I gave it as a gift but have feedback to share
    • Fit: Runs small

    Bought the Fission SV Insulated Jacket in a size Medium and it fit great, so got this in a Medium and it was too small. Size up one size with this.
    Other than that this is a great jacket. Works great under a shell or as a stand alone. Super light!

    Good for layering

    • Familiarity: I gave it as a gift but have feedback to share
    • Fit: True to size
    • Size Bought: M

    I got this for a friend who was starting a new job working outdoors, and this is what he had to say.
    The Good: True to size, no frills, sturdy, nice stuff-sack pocket, warm in the capacity of a sweater, looks fly
    The Bad: No interior pockets, leaks down early
    The Neutral: It's tight around chest and armpits for his body type

    good jacket needs a little to be great

    • Familiarity: I've used it once or twice and have initial impressions
    • Fit: True to size
    • Size Bought: large

    This jacket has kept me warm in cold weather and the fit in the body is good. I weigh 185lbs and I am 6' tall. the sleeves are a little tight in the forearm area, but not too bad, could add another inch to the circumference. The jacket packs down small and is very light. I love the stuff sack that is in the pocket. There are a few shortcomings with the jacket though. It could use an elastic drawstring on the bottom of the jacket. In windy weather wind tends to get in through the bottom of the jacket reducing the eficiency of the intended purpose . The other thing is they need to lower the zippers on the pockets down about and inch or an inch and a half. When my hands are in the pocket I feel them sitting on the bottom of the zipper and after a while of this stress I can see the zippers bowing out on the bottom. fix these and this will be a great jacket. and when you do fix these gripes, feel free to send me another Large. Thanks

    Great jacket

    • Familiarity: I've used it several times
    • Fit: True to size

    Super lightweight and pack-able. I have owned numerous other down jackets and this one is by far the warmest. Its a little slim - but its a slim fit - so I'd say its true to size. I would recommend this jacket for anyone, especially if you are looking for something to layer with

    Light, very warm for Active and casual

    • Size Bought: Medium

    Nice piece of Arcteryx. The Jacket is really light but very warm.
    Kind of relaxed fit. Color is perfect, I got the admiral and its just like in the pic.
    Use it for ski as midlayer under shell, goes perfect. Also use for casual, has great style.
    Love it

    Light and Comfortable

      It was a really great deal!!! The jacket fits me well... it's not snug, not loose, just comfortable. It's stylish too. It's a very lightweight jacket that packs a lot of heat. In fact, it's so warm that it's actually uncomfortable to wear when it's warmer than 40 degrees or so.
      That's the first reason for less than five stars - it's too warm, and with no way to relieve (ie side zippers for ventilation).

      Looks and Fits Great

      • Familiarity: I've used it once or twice and have initial impressions
      • Fit: True to size
      • Size Bought: large

      I had initial concerns about this jacket due to it being so light weight. Jacket did a very good job of keeping me warm. I normally don't layer too often in cold temperatures, normally I am comfortable in a t-shirt and jacket. The only concern with this jacket is buying a lighter color. Had 2 of the Mantis Green and sent them back due to the dark feathers in the down making the jacket look like it had stains. Otherwise it is a GREAT addition to my outdoor/survival cache.

      Pretty slick!

      • Familiarity: I returned this product before using it
      • Fit: True to size

      Although I didn't use this jacket after getting it I still thought it was a pretty cool jacket. It has an athletic fit and is crazy light. I would have given 5 stars if I actually had the chance to use it. I'm just basing my review off an initial impression.

      This jacket is crazy light and is meant as a layering jacket so if you're looking for something with some bells and whistles Arcteryx actually has other down jackets with all that stuff that are a little cheaper that just aren't as light as this one.

      This jacket fits true to size if you go into knowing it'll be snug.
      I exchanged this jacket for the hooded version.

      Great Jacket

      • Familiarity: I gave it as a gift but have feedback to share
      • Fit: True to size

      I decided to take the plunge and get this to replace my Patagonia Special Edition down jacket from 2010. I have an athletic build with 31 inch waist, but broad shoulders, 5”11”, 185 and constantly mistaken for Bradley Cooper, George Clooney and occasionally Ryan Gosling. Often times with most size mediums I’m good in the shoulders, but there is a lot of wiggle room in the torso. With Arcteryx gear I find them to fit better for my type of body. I was always happy with the Patagonia down sweater SE, but felt I was giving up efficiency with it being big in my torso. It was also a size medium. I’m very happy with my decision to get the Cerium. It is much better in fit throughout the body. I still have enough room to wear a base layer and something like a Patagonia R1 under it, should I ever need to. The neck on the Cerium allows for another layer to be zipped up under it. So far temps below 30 I’m good with just a shirt under it, if I added something like an R1 to it I’m confident this would take me well into the teens, single digits. On the opposite end with a T-shirt on if the temps go above 40, I think I would be too warm and need to swap into something that lets more air flow in to keep me cool. This is all based on walking around not doing strenuous activity. If I’m driving for an extended period of time in the car the jacket needs to come off, otherwise I’m sweating. The details with the articulated stitching are great. The jacket hardly moves when raising my arms. The build is solid, though I still get loose down feathers coming out of the seams, but not enough that this is causing concern. I’ve had a couple of frisky dogs jump up and no issues with paws tearing the shell. Unlike most down jackets such as the Patagonia down sweater this doesn’t come with a drawn string in the waist. I was worried about this, but because of the fit I’m not concerned now. If it’s really windy, I can just keep my hands in the pockets holding the jacket snug so no wind comes up the back. For the most part I’m good, and what I gain in weight savings is worth it. The pockets are slightly raised to accommodate a harness. This might be less desirable for those looking to just use this for walking around town looking cool, but if that’s the case don’t buy this jacket as it’s intended for folks that actually get out and do stuff.

      Love this jacket

      • Familiarity: I've used it several times
      • Fit: True to size
      • Size Bought: Large

      I can't much more than I love this jacket. fits well, looks good, and it seems to be plenty warm (for me). Love the little details (like the way the stuff sack is attached to the pocket), but yet simplicity.
      I stated true to size but I think it runs just a little small compared to average. I like the fit because usually Large is to big and medium is a bit small. This large fits me nicely.

      medium fits a slim 5'8" person well

      • Familiarity: I've used it several times
      • Fit: True to size
      • Size Bought: Medium

      I'm a few weeks in to this jacket and it's been amazing so far. I layer it underneath a size Small Norrona Lofoten jacket and it's the perfect cold weather piece for alpine skiing. (I got the non-hooded Cerium LT.) I would have killed to have this when I was night skiing in Ottawa earlier this season. My 0� Farenheit layer strategy is (from base out): compression base layer; Airblaster Ninja Suit (merino); Cerium LT; Norrona Lofoten shell. When paired with the Astis mittens, you are indeed staying warm and positive.

      I keep returning to this piece as streetwear in SF, where its typical/awesome tailored Arc'teryx cut makes it totally presentable. I'm 5'8" built like a soccer player (slim but not skinny) with a 15/33 shirt size and this jacket feels absolutely custom fit to my frame in Medium. If you are familiar with the legendary Arc'teryx Atom LT hooded jacket (which I have worn into the ground) the Cerium LT is more tailored through the torso, in an awesome way. I'm curious about the Thorium, but haven't compared this.

      Very warm, Great fit

      • Familiarity: I've used it several times
      • Fit: True to size

      Looked a long time for a good looking warm casual jacket. Finally found it! 6'3" 195#, athletic frame, and Large fits perfect. This jacket is so warm. I will use it as mid-layer skiing, but so far I have just used it to wear around town on really cold days. Feels great, fits great and does the job.

      Amazing jacket with a truly glaring flaw

      • Familiarity: I've used it several times
      • Fit: True to size

      After shopping around for a few months for a really good down jacket I decided to get this one. It really caught my eye with the styling, the color, and Arc'teryx's well known level of quality. The jacket is amazingly light and warm. In fact, I was able to wear just a t-shirt underneath in freezing temps and be very comfortable. The jacket also fit me like a glove and I'm 5'11'', 200lbs, athletic build. However, the glaring flaw was apparent from the first day of wearing it. The down just seemed to pour out of this thing. Both, on the outside and the inside of the jacket. The feathers would be coming out through the seams and through the material. It would be an amazing piece if it wasn't for this huge flaw. Because of this I returned it as well as not wanting to deal with having to send a brand new jacket for repair only a few days after purchasing it.

      Same issue here. I sent it back to ArcT and they told me that it was normal to experience the down coming out. However, with all other pieces I've owned from Patagonia and Marmot the Cerium was irregular with the amount coming out. My Sidewinder shell was covered in down after one day of wearing this as a mid-layer. If you look around online you will find it is a big gripe with most people. Arcteryx offered to send me a different jacket but not another Cerium. I think they need to go back to the drawing board and put a different nylon shell on this piece even if it kicks up the weight another OZ. I wasn't prepared to take them up on the offer, but in hindsight I wish I grabbed the Thorium. This fit and design are great just put a better shell material around it ArcT, and send all of us a new one:)

      So close to perfect... but not

      • Familiarity: I returned this product before using it
      • Fit: Runs small

      After all the awesome reviews couldn't wait to receive jacket... Let down, the fit for me was off. The Construction and feel of the jacket are superior as most Arc'T products. However not sure why they tailored the jacket to be so tight around the chest area. I am an athletic build at 160 lb With a V shape torso and the cut of this jacket is more like a rectangle. I ordered a Med before I give up I will try the Lrg, wish me luck... Review TBD

      I was looking for a jacket to wear over a t-shirt, hence the reason I tried the Cerium. "These trim fitting garments share motion-friendly traits with our Athletic fit, but are patterned with lower volume for reduced bulk. " Arc'teryx website. In Arc'teryx products a medium suits me quite well and this time it didn't work out... A real Bummer for me. The fit everywhere else was perfect waist, stomach, shoulders, arm length, however the mid-chest and armpit area was tight, too tight. The Thorium you suggested is bulkier then what I was looking for, thanks for the suggestion though.

      My husband has one of your insulated jackets and loves it but lost the caring instructions could you tell me how to clean this jacket


      Down is not as scary to care for, as it seems. Use a gentle detergent, and wash on a gentle or normal cycle. Dry it in the dryer with tennis balls. The down needs to be puffed up, while drying, to create the loft. So, put something with soft edges in there, while its drying. More questions? Just call or email me, directly. 801.746.7587 ---->

      I'm 5'8" and weigh 200 lbs. Should I consider a large or extra-large cerium lt down jacket?

      Hey everyone--quick question.

      I have a hard shell (barely insulated) and a solid fleece. I was hoping to get a light-weight down jacket to layer with, or wear alone conditions permitting. I hike (nothing too intense) 1-2x/month when I can get free. I'm looking to buy a down jacket that I can use to stay warm up in Boston, both when I'm just getting around and also when I get to hike.

      My question is this: is there a reason to get, or not get, this jacket with a hood? I don't really imagine too many times where I'd use the hood, but I'm not really sure. The price difference isn't a big deal if there's something I'm missing. Ideally, I'd like to wear this with a shirt or light baselayer to get around, so maybe having a hood around helps in case it get's wet, but then, I would want a shell regardless for the down, no?

      The hood is definitely a preference thing. If you don't see yourself using it, it's probably not worth your money to get it, especially since not having it makes it easier to layer under a hardshell unless you're actually going to wear the hood. On the other hand, if you can even imagine a situation wear the hood would be nice I don't think it'd be a bad thing to spend the little bit of extra on. I used to only buy jackets without hoods because I preferred to wear a separate hat to insulate but have since found I actually prefer to have a hood.

      If you want to use this jacket for every day situations as a stand alone (without your hard shell) I'd also take a look at the thorium as well. It weighs a little bit more, but I think as a stand alone, the trade off is worth it for the extra durability.

      Where is this jacket made? Is it made in...

      Where is this jacket made? Is it made in China?

      How does the fit compare to the thorium?...

      How does the fit compare to the thorium? I have tried on a medium thorium and it fits perfectly, but I think I like the cerium better. Not sure if I should get a large or a medium in the cerium. Thanks, scott

      Best Answer


      It would be easier to give you an estimate if I knew some of your measurements but perhaps it will help to give you some of mine. I am 6'0" 180lbs and I am a proud owner of the Arc'teryx Cerium LT in a size large. I have tried on the medium before and it will fit, but it is a little too tight in the shoulders.

      I have also tried on the Thorium AR before and while the large is much too big, the medium fits me very well. This difference in fit can at least partially be attributed to the fact that Arc'teryx classifies the Cerium as a trim fit and the Thorium as an athletic fit. So for my build, the Thorium in a medium and the Cerium in a large.

      You may be the same, or you may take a medium in the Cerium. I would say that if your build matches roughly with mine chest: 40" and sleeve: 34.5" you should get the large. If you are at all smaller than me, I would recommend the medium in both jackets.

      whats gonna be warmer this or my patagonia...

      whats gonna be warmer this or my patagonia down sweater

      Best Answer


      The Patagonia Down Sweater is a classic piece of light weight down. One of the original jacket to focus on giving solid warmth in a packable light weight package. However, the PDS has not been updated too much over the years and has become somewhat of a fashion piece. "Not that there's anything wrong with that." I think they look pretty classy, and Patagonia's commitment to a sustainable business model is pretty much unparalleled in the industry (who doesn't want to support that).

      However, the Arc'teryx is really playing in a whole different league with the Cerium LT. With 97g of 850fill down in the body, 80g coreloft in the cuffs and underarms and 100g coreloft in the shoulders, the Cerium is toasty the second you put it on. Warmer than the Patagonia Down Sweater and more than 4 oz lighter. The Arc'Teryx Cerium LT is no slouch for fashion either with a trim fit and great colors.

      For more comparisons on these two jackets and others in their category you can check out the Outdoor Gearlab website:

      Could someone post some pics of the nighthawk...

      Could someone post some pics of the nighthawk color in natural light or without flash?