Arc'teryx Thorium AR Hooded Down Jacket

Priced: $284.95 - $285.00 Rated:   - 4 stars out of 5 by 4 reviews.
Arc'teryx Thorium AR Hooded Down Jacket
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Color: Olympus Blue
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Arc'teryx Thorium AR Hooded Down Jacket -

The element, thorium, was named after Thor, the Norse god of thunder. It stands to reason that Arc'teryx attached the same moniker to the Men's Thorium AR Hooded Down Jacket. This down jacket will protect man from the evils of winter and the perils of packing when space is at a premium. The combination of 750-fill European grey goose down and specifically situated synthetic insulation offers aggressive warmth when this jacket is worn over a thermal baselayer if you're working hard, and when it's worn under a hardshell if Thor is flexing his muscles and throwing storms in your face with gleeful abandon.
Down is a fowl mix of feathers and clusters that work cooperatively to create air pockets in and amongst the fiber structure. Air pockets are little barricades, preventing warm air from escaping and cold air from entering. Synthetic insulation works the same way, except instead of using feathers, it uses man-made materials to create the air-pocket barricade. The big difference between natural and synthetic insulation becomes evident when moisture is an issue. Wet down is dead down, and you'll go down quickly from the cold. Synthetic insulation resists water penetration and dries quickly when water wins out, reducing your exposure to cold, wet conditions. The designers at Arc'teryx exploited the differences in insulation to your benefit; areas that are the first line of exposure to the elements, like your shoulders, the hood, and the collar, are filled with Coreloft instead of down.
The athletic fit and low-profile cuffs cut a trim silhouette, and if it's 60F when you're putting together gear for a cold-weather adventure, the Thorium squishes down into a cylinder not much bigger than a large coffee for easy packing. Throw it in your bag and still have room left over for essentials, like chocolate bars and beef jerky.


  • Breathable Coreloft™ insulation along hood, hem, collar and sleeves.

Wash and Care:

  • Machine wash cold, tumble dry low.


  • 100% nylon with down fill.
  • 750-fill European grey goose down, 100g (M)
  • Coreloft insulation, 80 and 140 g/m2


  • 27 1/2" length (size Medium).

Weather and Wind:

  • Wind resistant.


  • 2 zippered hand pockets
  • Front zip closure with chin guard.


  • Athletic fit, hip length


  • Colibri 40D mini-ripstop nylon, DWR finish


  • Stuff sack included
  • Men's Sportswear.
  • Lightweight, packable design with carry bag.
  • Elastic cuffs.
A sleek, quilted down jacket features a Durable Water-Repellent finish and streamlined, insulated StormHood™ that make it easy to stay dry and warm out in the elements.
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Arc'teryx Thorium AR Hooded Down Jacket Reviews:

Positive Reviews:

Here is some basic info to help you better make a buying choice. I thought the 40D fabric would be a little more durable feeling/ thicker, but feels the same as Patagonia's nylon. I like the low sheen of this fabric, not shiny as most of this type are. The inside has more of a shine and is a thinner nylon.
The fit is good, like an Atom SV if you have tried one on. Not like the Atom lt which I can fit in a small but is pretty snug. I bought this in a small and have room for base layer and 200 fleece. I am 5' 9"- 38" chest and 140lbs with a slim, runner type build.
The zipper runs smooth and feels and looks the same as Atom series.
The hood is nice and not as big as the Atom SV, which I like.
The pocket openings seem small to me, you can see from the picture with the measuring tape. I feel it would be tight to put hands in pockets with thicker gloves on.
Haven't worn it outside, not cold enough yet.
Quality and workmanship is good, same as other Arc, just wish they would have kept business in US, we need the jobs!

hegaveitall at on 10/13/2013

I am very happy with Arc'teryx and Backcountry ! I'll 1st start off with Backcountry and there awesome service and help when trying to purchase something. The staff is very helpful and they get your purchases out quick. The Thorium is an excellent choice, the overall craftsmanship is very well done. Zippers work very well and very easy, there is a heat guard behind the front zipper . The down is quality down and not boney feathers. The jacket is very warm and they give you enough room to layer underneath if you encounter severe cold weather. They due put plenty of down in the jacket so the ribs are full, I do wish they would have put more coreloft insulation in there designated areas, they should have doubled the amount. Over all the jacket looks great on and you will be noticed and complimented constantly.

Hank at on 01/17/2014

I bought the Thorium AR for two reasons. 1. The zipper is vislon, with the plastic teeth which is just awesome. The Cerium does not use that. 2. I also prefer a 40D nylon over the 20D that the cerium uses.If you have ever seen them in person, 40D although not that durable is way way stronger than the 20D. Both jackets fit under my Alpha LT hardshell but the thorium is a better stand alone piece. I dont notice much warmth between 850 vs 750 fill down. Only thin about the Cerium that is nicer is it has a hood adjustment but the trim fit and short length really make it a layering piece. I am 5"10 175lbs and a medium fits me perfect. Feels simliar to an ATOM SV.

Tester at on 12/06/2013

Negative Reviews:

I live in Northern Minnesota, where during the winter months it can be anywhere from 30 to -30 degrees. This jacket just isn't thick enough to handle the days that are colder than others. +30 maybe.. but anything below that this is too light. Don't get me wrong it's a nice jacket, but for this kind of money I need something more versatile and durable. I will be returning.

Patrick Moore at on 01/06/2014