Arcteryx's Therme and Camosun are their second and third warmest parkas coming after the warmest Thorsen. All these jackets are designed for walking around town when it's freezing out (so called "line 24").
You can see this in Arc'teryx naming scheme at arcteryx.com as well.
In summary, if the subject temperature range is mostly going to be somewhere between 0 - 15 deg F (-18 - -10 deg C), then both Therme and Camosun would be warm enough. Maybe also consider underlayer getting a good Arc'teryx base layer for more inclement days.
You'd probably overheat inside the Thorsen at these temperature ranges. So consider it for lower ranges: around 5 deg F (-15 deg C) and below.
In this post, I'll first get to the bolts and nuts of Therme vs Camosun, and then move to who should consider getting a Thorsen and under what circumstances.
Let's get to it.
All 3 jackets use the same 750 fill power European goose down (which is top notch quality - read more about it here if you're curious).
However, the down amount varies (which is another major factor that determines jacket's warmth):
- Thorsen is equipped with the highest amount of down (192 grams) and hence the warmest.
- Therme is the second warmest with 120 grams of down.
- Camosun is the third - it has 105 grams of down.
Find below the lowest temperatures you can wear each jacket without feeling uncomfortably cold.
These are only approximate values assuming:
- you only have a shirt under and no shell over,
- during daily use (strolls, power walks etc at most - no high output activities),
- with light wind,
- and when it's dry out.
°F / °C
Arc'teryx LEAF Cold WX Parka SVX (Men's)
Arc'teryx Ceres SV (Men's)
Arc'teryx Dually Belay Parka (Men's)
Arc'teryx Thorsen Parka (Men's)
Arc'teryx Centrale (Women's)
Arc'teryx Piedmont (Men's)
Arc'teryx Therme Parka (Men's)
Arc'teryx Camosun Parka (Men's)
Arc'teryx Radsten Parka (Men's)
Arc'teryx Macai (Men's)
Arc'teryx Andessa (Women's)
Arc'teryx Patera Parka (Women's)
Arc'teryx Alpha IS (Men's)
Arc'teryx Radsten Insulated (Men's)
Arc'teryx Kappa (Men's)
Arc'teryx Sensa Parka (Women's)
Arc'teryx Magnus Coat (Men's)
If you think you run warmer or colder than the average person, then shift these temperature ranges accordingly.
See the performance ratings of these jackets too: https://outdoorcrunch.com/arcteryx-wiki/
- Thorsen has the longest hemline (36 inches), falls almost to the knees.
- Therme is a bit shorter at mid thigh (33 inches), and it comes with a boxier "relaxed" fit which is called "regular fit".
- Camosun is the shortest (31.5 inches) - just a bit lower than waist. It has the trimmest fitting.
They're all equipped with Gore-Tex, so the wind is 100% blocked.
Revision to the Therme:
- Redesign includes updated style lines for a more relaxed fit, a two-way WaterTight Vislon zipper with a snap placket, and synthetically insulated hood and neck gasket for additional warmth.
Revision to the Camosun:
- Redesign includes updated style lines for a more refined aesthetic.
The information given in this post applies both to the most recent (2020) and the previous versions of Therme and Camosun.
So what should you consider when getting either one of these jackets?
If the lowest temperature you'll face won't be much colder than 15 deg F (-10 deg C)
In other words, if you'll be in Milwaukee, Toronto, Chicago, Cleveland, Detroit, Boston, NYC, or any other similar temperature range city; then both Therme and Camosun would feel warm enough for around 90% of the winter.
For the remainder of the winter, you can easily use another simple fleece underneath either of these jackets. And I don't mean something high-quality like Arc'teryx either, even a t-shirt + hoody combo would work.
Therme and Camosun: Warmth difference
The difference is minimal, but not non-existent. If you feel fairly cold inside a Camosun, I'd doubt Therme would solve your warmth problems in the same setting. But still, there are things you'd better consider.
I put together the things you should consider regarding the warmth differences between these two jackets under 3 main subheadings.
Compared to Therme, the Camosun is going to be more restrictive when you're trying to layer due to its trimmer fit. It might feel less comfortable if you try layering with a bulky synthetic insulated jacket beneath, such as Atom AR.
Part of the extra down in Therme (120 vs 105 grams) you see in the product specs results from Therme's 1.5 inch longer hemline. It naturally requires more down. It'll cover a larger portion of your hips - which can be especially important if you don't have or aren't planning to get insulated pants.
Also, even when you ignore the Therme's extra hem length, it still uses a little bit more down than the Camosun - hence a bit more warmth.
3- Traps more air
Baggier cut doesn't necessarily mean that it'll provide more insulation than a more snug cut in every situation. It's contextual and depends on many factors such as how baggy or snug the jackets are, their fill quality (fill power), lengths etc.
But in our case, Therme isn't too baggy to let the air circulate too much and hence let the cold air in. It doesn't use a lower quality fill either.
So, since more insulation is always achieved by trapping more "heated" air, in the end, Therme provides a bit more warmth.
As you see, the warmth difference is there, but it isn't as big to make you pretty much ignore other stuff. I'd pay at least as much attention to style, hood and personal layering needs.
I'd recommend you to check out my Therme Parka review as well.
If you're fit or thin, Camosun's trimmer cut might look better on you.
Baggier cut of Therme benefits you in warmth, as I explained earlier in this post, and this is how the baggier cut looks:
Proceed at your own taste...
Camosun's hood is detachable (separate hood) and that of Therme's isn't (integrated hood). This difference in hood construction naturally causes their collar configurations to differ as well.
Camosun's collar is always up, whereas for the Therme the hood should be in use for collar to be standing up straight.
Higher collar is typically expected to block more wind, and I'm not saying this is incorrect. But even when the Therme's hood isn't in use (e.g collar isn't standing), you can still zip it upwards and raise it to a position that's as high as that of the Camosun's:
Still, though, it won't feel as comfortable as the Camosun's collar. This is why they're both equally great in terms of blocking wind when the hood isn't in use, but Camosun is more comfortable.
On the other hand, when you need more wind protection, Therme's collar will reach up higher when the hood is in use:
If you can picture some situations where you'd prefer the hood removed, then that obviously is going to be an another advantage for the Camosun.
What about the Outer Shell Differences?
Thorsen offers a 90D, Therme a 75D and Camosun a whooping 150D outer shell fabric.
This means that the Camosun will feel burliest and Therme the smoothest in your hands. But most importantly, all of them are very durable.
Why does Arc'teryx's site state windproof for Therme and not for Camosun?
Product information on Arcteryx's site is often misleading. I can give you a thousand examples, but even in our current case you can see that the Coreloft density is left unfilled for the Therme. It is, however, equipped with it.
For windproof; all Camosun, Therme and Thorsen jackets are 100% windproof because of their high quality Gore-Tex membrane. There's nothing you should worry about.
That's all you should know about the Therme and Camosun so far.
Now enter my friend Thorsen - and let's get to its review.
It's important to note that the Thorsen would probably come too warm for the above temperature range and set-up. Vast majority of people would likely overheat in it (unless they run quite cold). Because it's designed for freezing temperatures.
...so if you'll be facing a considerable amount of colder days
Say, if you'll be facing as low as 5 deg F (-15 deg C) and below (Montreal, etc), then I'd recommend getting either:
- Therme or Camosun (but probably Therme - read below paragraph) AND a good fleece under (such as this one of Arc'teryx) for extra layering (Therme and Camosun alone probably wouldn't be enough to keep you very warm at this cold),
- The Thorsen (this Wildwood color is really liked by many - including me).
If you choose to go with option #1, again, it's good to note that Camosun is going to be more restrictive in this situation due to its trimmer fit. I'd probably get the Therme and reap the extra warmth benefits as well.
Although the temperature differences between the Therme and Camosun are minimal, this isn't the case for Thorsen. It's significantly warmer than both of these jackets.
For the vast majority of people, even if you layer Therme or Camosun with another synthetic insulated jacket (such as one of these) they still won't feel as warm as Thorsen by itself.
This is actually stated by the Arc'teryx staff themselves:
In short, if you want to maximize warmth, Thorsen is the way to go for you. But if you have more $$$ to spare, then layering would give you more versatility. Proceed with your personal needs and desires.
Lastly, all these jackets are DWR coated - which means that they repel water just fine.
DWR is a coating.
It's basically sprayed on to the surface of these jackets as a finish. It stands for Durable Water Repellent - which means that water will be repelled under wet conditions instead of soaking into the fabric.
DWR also decreases dry time.
It's a good thing these jackets are coated in DWR, but pay attention to the fact that DWR is a coating - meaning that it will wear off over time.
Which is why you might want to invest in a DWR spray such as this one for after treatment.
As you see, there's a strong correlation between FP x FW and temperature ratings, but not more than, say, 80%. I explained why this happens here in this post of mine.
If you're interested, here are the product videos: