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Home / Gear / Jackets / Insulated Jackets

Temperature Ratings of Insulated Jackets

Last updated: January 13, 2021 by Canberk Koksal 22 Comments

  • Looking for temperature ratings only?

Jump there: 

  • Down jackets
  • Synthetic insulated jackets
  • Arc'teryx & Patagonia only
  • Full list

As most of you already know, I've been publishing guides to insulation for years now. You can find the full list at the bottom of this post.

In addition to these guides, I've also continuously been conducting this study to answer most of our questions about the temperature ratings. This post is still updated on a regular basis.

I hope it turns out to be helpful for you!

If you're interested to see the results only and skip the thought process behind this study, navigate accordingly:

Insulated Jackets: Temperature Ratings
Understanding the Working Principle of Down Insulated Jackets
Fill Power
Other roles of fill power
Fill Weight
Warmth Calculation
Understanding the Working Principle of Synthetic Insulated Jackets
CLO value
Warmth Evaluation
Other factors
Bagginess
Length
Outer fabric 
Fill distribution
Results: Temperature Ratings
Down jackets
Synthetic insulated jackets
Arc'teryx & Patagonia only
Full list
Supporting documents

Let's clarify one thing before we get to the nitty gritty of insulation. 

  • Most companies will claim that providing temperature ratings isn't possible

And I don't think that they're incorrect. There are tons of fluid parameters that are difficult to measure if not impossible.

Not to even mention the subjective nature of the feeling of warmth. 

Having said that...

I think it is possible to provide approximate values for an average person making some strict assumptions around layering and weather conditions. 

Which is what you'll find out in this post. 

I'll be evaluating the context of this study in two parts: 

  • Down jackets,
  • Synthetic insulated jackets.

Let's start. 

Understanding the Working Principle of Down Insulated Jackets

Down quality and down amount are the two most important things when it comes to the ultimate warmth provided by any down insulated garment. 

You'll mostly come across this as fill power and fill weight respectively. 

Because the word "down" is typically referred to as "fill" within the language of down pieces. 

Let's take a look at the former first. 

Fill Power

Fill Power represents the fully expanded, end volume of a 1 oz down (goose or duck). It's in cubic inches. 

For example, a 800 FP (fill power) down will end up getting 800 cubic inches when it's fully expanded. 

  • How and why does a higher FP down offers higher warmth?

Because the insulation occurs by trapping air within the vacant spots of down, followed by having that air heated using our body heat as the source. 

So, the higher the volume of trapped air (which is directly proportional with Fill Power), the more air will be heated & work as insulation as a result. 

Fill power. 

In the end, you'll feel warmer inside the jacket you're wearing. 

This number varies anywhere from 500 to 1000, although the majority of quality brands (such as Arc'teryx, Patagonia, Feathered Friends, Outdoor Research, Marmot, REI Co-op, Enlightened Equipment, Rab, Black Diamond, Mountain Equipment and Mountain Hardwear)...

...mostly use down between 650 FP and 850 FP. 

As you'll see, there are outliers, though. A notable one would be Feathered Friends Eos, which is equipped with a whooping 900 FP down. 

Now before we get to fill weight, speaking of fill power...

...warmth actually isn't the only thing that it affects. 

Other roles of fill power

It has additional three important roles: 

  • Loft retention during movement: Higher FP down will retain its loft with minimal loss during movement. The lower the FP, the larger the loss in this department. 
  • Higher impact on end warmth: Compared to FW (fill weight), FP has a larger impact on the warmth the insulated jacket provides. 

For the sake of minimizing confusion and keeping this as clear as possible, I decided to place equal importance (weight) on fill power and fill weight when calculating FP * FW values (which you'll come across as you read on). 

...although I did include these effects when calculating the temperature ratings of jackets within their first year.

After all, FP * FW is not the only factor considered while laying out the temperature ratings.

Tens of parameters are assessed, and the values put together at the end are the final results, including the few extra effects of fill power. 

  • Durability of insulation capability 
    • A jacket with a higher FP down minimizes its loss of insulating power over time. You'd be able to use a 850 FP down jacket for decades, and it'd feel almost just as warm as the first day you put it on. 
    • A jacket with a lower FP down, on the other hand, might not and probably will not prove nearly as durable. In my experience, jackets equipped with 650 FP down will probably feel noticeably colder after, say, 2-3 years. 

If you, on the other hand, are like me and not planning to use your jacket for more than a few years, then this might not be that important to you after all. 

By the time it starts to lose its insulating power noticeably, you'll have gotten yourself a new piece anyway. 

  • Compressibility: A jacket with a higher FP down will offer a smaller packed size. 

Here's a video that also does a good job explaining fill power: 

Moving on to our other major factor... 

Fill Weight

Fill weight is the total amount of down the jacket is equipped with. 

Some other resources might claim that fill weight is much less important than fill power when it comes to warmth, but that's far from reality.

In terms of warmth, fill weight is very, very important. Almost (in some conditions it even is) just as important as fill power. 

Because, just like fill power, fill weight also directly affects the total amount of air trapped within the vacant spots of down. 

Warmth Calculation

So... 

Like I said, fill power and fill weight are the two most important factors when it comes to warmth. 

In many cases, on a larger scale, assuming both jackets are equipped with the same amount of equally capable synthetic insulation, it is possible to make very close estimations by multiplying them when comparing warmth ratings of two different pieces. 

For example...

  • Feathered Friends Eos offers 105 grams of 900 FP down. 
    • 105*900 = 94,500
  • Outdoor Research Transcendent offers 116 grams of 650 FP down. 
    • 116*650 = 75,400

Since 94,500 is significantly greater than 75,400; it's safe to say that the former will be noticeably warmer than the latter. 

On top of that, because Eos offers a higher FP down,

  • it'll stay almost equally warm even after decades, 
  • it won't lose its insulation during movement,
  • and is more compressible.

Now...

There are reasons why this mostly won't work on a smaller scale (more on these later, under Other Factors heading). 

  • What do you mean by smaller scale?

Comparing two jackets with, say, 125,000 and 120,000 FP * FW values.

Understanding the Working Principle of Synthetic Insulated Jackets

Synthetic insulated jackets imitate the working principle of down insulated jackets. 

They're equipped with artificial insulators, rather than natural down obtained by geese and ducks.

Some examples to the names of these artificial insulators can be given as Coreloft and PlumaFill. 

Comparing the temperature ratings of synthetic insulated jackets is more difficult. 

Because, unlike fill power parameter in down jackets, there isn't a common denominator to compare different types of synthetic insulators in an analytical way. 

Maybe except one parameter? 

CLO value

CLO value is the insulation power of an insulation setting.

For example, this value is 0.92 for 1 oz (28.35 grams) of a dry PrimaLoft One for one square yard. 

The important thing here is that unlike fill power, CLO is not a characteristic that is unique to one ounce of the material.

As you see in the example above, it isn't independent from the area of insulation (square yards). 

So, a higher CLO actually points out to the insulation capability of an insulation setting as a whole. It does NOT necessarily mean that the insulator being used is any more capable than an insulation setting put together with a weaker insulator. 

Given the right amount of thickness, any insulator can achieve desired CLO value. It's just going to end up being heavier. 

So, metaphorically, you can think of CLO value in synthetic insulated jackets as FP * FW value in down insulated jackets. 

Unfortunately, obtaining the CLO value for commercial products is absolutely impossible. 

Having said that... 

We can (and we do) use a made-up parameter to CLO/oz/yd² to replicate FP in down jackets. 

Honehstein Institute certified. A quick recap here: As you see, synthetic insulators lose minimal insulating power when they get wet. Down, on the other hand, loses a lot of it. 

But unfortunately, a new problem arises here. A fair amount of manufacturers come up with their unique insulators - such as Coreloft, PlumaFill, Octa, Stratus, FullRange, etc. 

And just like CLO values, they're unwilling to reveal the CLO/oz/yd² values of their insulators too. Which are the numbers we would need to determine the warmth. 

I asked Arc'teryx and Patagonia Customer Services myself about this, and came back empty handed. 

Having said that... 

During my research, I did come across some useful information that I can leverage. For example, as it turns out, the CLO/oz/yd² value for PrimaLoft One is 0.92. It's also 0.79 for PrimaLoft Sport and 0.74 for PrimaLoft Eco. 

However... 

These values aren't certain or completely trustworthy by any means. They aren't the results of scientific studies. I didn't detect them in any other place rather than forums, Reddit, or contacting manufacturers myself. 

In the end, I put what I could find together and did my best to make an estimation. Fortunately, this calculation using the numerical value CLO was not the only information I had in my hands. 

I had two additional (at least equally helpful) data: trying them out myself when I could, and gathering offline user experience. 

Warmth Evaluation

So, in the end, I used at least two of these three items to estimate the overall temperature rating of an insulated jacket: 

  • Analyzed them scientifically (as explained earlier), 
  • Trying them out myself when I can, 
  • And/or gathering offline user experience. 

And mostly all three above. 


In addition to insulation types and amounts (which is what I covered so far), there are also other factors that impact the warmth of an insulated jacket. 

Other factors

Let's talk about the most important and most common examples of these factors.

In most cases, these are considered minor next to insulation specific qualities. But they do have a noticeable effect, and combined together, they might come close to affect the warmth as much as the insulator capability and amount. 

  • Bagginess,
  • Length,
  • Outer fabric,
  • Distribution of insulation. 

Bagginess

I also talked about this more in my my Arc'teryx Thorsen vs Therme vs Camosun post. 

Baggier cut of Cerium SV helps with its incredible warmth. 

Briefly, the amount of trapped air increases as the jacket gets baggier. So more air works as insulation, and ultimately you're kept warmer. 

There certainly is something as "too baggy", though. After some point, more inner volume only holds the warmth back. 

Length

This has two effects.

First one is that the amount of trapped air, which is explained above.

And second, in colder weather, it becomes much harder to warm your legs and feet than your torso and arms. 

This is why a jacket with a longer hem length will feel warmer. And the difference is pretty noticeable. 

Outer fabric 

Outer fabric is actually much more about weather resistance, but it also affects warmth a little bit. 

As explained earlier, no down jacket is able to offer top notch weather resistance since they get clumped and lose their loft when they get wet. Either from your sweat or from weather conditions. Doesn't matter. 

Having said that, it's still possible to prevent it to a certain degree. Some products offer a more fragile face fabric, while others can bead water more efficiently. These are directly proportional to face quality and DWR coating. 

  • What is DWR by the way?

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. 

For face fabrics, I'd list them like this: 

Perfex Quantum Pro = Arato 30 > Perfex Quantum > Arato 10 = Drilite Loft 40D > Arato 7 = Drilite Loft 20D > others.

For synthetic jackets, outer fabric affects the warmth noticeably less. 

Fill distribution

Some products of my favorite brand Arc'teryx are guilty of this. Take Firebee AR (read my review), for example. Nothing is wrong with the insulation at the back, collar and torso. They feel perfectly warm. 

Whereas the insulation in arms, especially in lower arms, are seemingly slightly inadequate, which in the end affects the warmth feeling a little bit. 

Results: Temperature Ratings

Down jackets lose insulating power noticeably when its wet out. Synthetic jackets don't. This is why the dry weather assumption was made for both of them. 

This is why, I'd recommend synthetic insulated jackets for folks located in damp areas. 

Down jackets

All Arc'teryx down insulated products are also equipped with a fair amount of synthetic insulators in addition. 

This is why you'll see them rank higher with lower FP * FW values. 

In addition, these synthetic insulators are placed strategically at high wear areas (like under arms, shoulders and back) to increase the life time of the insulation. 

This is not only a great advantage in theory, but it also works perfectly fine in practice as well. 

#Sidenote: Winter Parkas are not included in this table. Check out the table under Full List Heading to see where they're positioned. 

  • Data Set: Temperature Ratings of Down Jackets

Approximate lowest temperatures you can wear each down jacket in the market without feeling uncomfortably cold are... 

 

°F / °C

Fill Power

Fill Weight (grams)

FP x FW

Face Fabric

 

Arc'teryx Ceres SV (Men's)

-15/-26

850

240

204,000

Arato 30

Read Review

Patagonia Grade VII (Men's)

-11/-24

800

335

268,000

1.2 oz 15 & 20D Perfex Quantum

 

Arc'teryx Firebee AR (Men's - Women's)

-10/-23

850

225

191,250

Arato 7 & 10

Read Review

Rab Neutrino Pro (Men's - Women's)

-5/-20

800

227

181,600

Perfex Quantum Pro

 

Arc'teryx Cerium SV (Men's - Women's)

-5/-20

850

162

137,700

Arato 7 & 10

Read Review

Arc'teryx Piedmont [NEW] (Men's)

-2/-19

750

218

163,500

Arato 10

 

Mountain Equipment Lightline (Men's - Women's)

-2/-19

700

280

196,000

Drilite Loft 40D

 

Outdoor Research Alpine Down (Men's - Women's)

3/-16

800

182

145,600

Perfex Quantum Pro

 

Mountain Equipment Skyline (Men's - Women's)

5/-15

700

179

125,300

Drilite Loft 20D

 

Rab Microlight Alpine (Men's - Women's)

7/-14

700

153

107,100

Perfex Quantum

 

Feathered Friends Eos (Men's - Women's)

8/-13

900

105

94,500

Perfex Quantum

 

Arc'teryx Thorium AR (Men's - Women's)

8/-13

750

130

97,500

Arato 30

Read Review

Patagonia Jackson Glacier (Men's - Women's)

12/-11

700

141

98,700

3.6 oz 50D polyester

Read Review

Patagonia Hi Loft Down (Men's - Women's)

14/-10

600

177

106,200

1.4 oz 30D polyester

Read Review

REI Co-op Magma 850 Hoodie 2.0 (Men's - Women's)

14/-10

850

120

102,000

Pertex mini ripstop nylon

 

Black Diamond Access Down (Men's - Women's)

16/-9

700

133

93,100

30D Ripstop Nylon

 

Arc'teryx Cerium LT (Men's - Women's)

17/-8

850

102

86,700

Arato 10

Read Review

Patagonia Down Sweater (Men's - Women's)

19/-7

800

104

83,200

1.4 oz 20x30D polyester

Read Review

Patagonia Silent Down (Men's - Women's)

26/-3

700

109

76,300

2.2 oz polyester

Read Review

Outdoor Research Transcendent (Men's - Women's)

26/-3

650

116

75,400

20D ripstop nylon

 

Mountain Hardwear Ghost Whisperer/2 (Men's - Women's)

28/-2

800

85

68,000

10D ripstop nylon

 

Outdoor Research Illuminate (Men's - Women's)

30/-1

800

81

64,800

10D nylon

 

Marmot Ares (Men's)

32/0

600

102

61,200

1.2 & 1.8 oz polyester

 

Arc'teryx Cerium SL (Men's - Women's)

40/5

850

52

44,200

Arato 7

Read Review

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. 

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 enough wind to cause an umbrella to twist in your hand, 
  • and when it's dry out.

If you think you run warmer or colder than the average person, then shift temperature ranges accordingly.

Synthetic insulated jackets

If a jacket is insulated primarily with down and secondarily with synthetic insulators, then that's counted as a down jacket, and is listed above. 

The reason that they're counted as down is because most down jackets out there are already supported with synthetic insulated at high wear areas. 

  • Data Set: Temperature Ratings of Synthetic Insulated Jackets

Approximate lowest temperatures you can wear each down jacket in the market without feeling uncomfortably cold are... 

 

°F / °C

Insulation

Insulation Amount

Face Fabric

 

Arc'teryx Dually Belay Parka (Men's)

-7/-22

ThermaTek

92 g/m²

30D Nylon

 

Arc'teryx Fission SV (Men's - Women's)

3/-16

Coreloft Continuous

90 g/m² body and arms, 65 g/m² hood and under-arms

N80p-X Gore-Tex 2L

 

Arc'teryx Radsten Parka [NEW] (Men's)

3/-16

Coreloft Compact

120 g/m²

NP100d Gore-Tex 2L

 

Rab Nimbus (Men's - Women's)

5/-15

Cirrus

233 g

Atmos ripstop

 

Arc'teryx Radsten Insulated [NEW] (Men's)

7/-14

Coreloft Compact

120 g/m²

NP100d Gore-Tex 2L

 

Arc'teryx Kappa (Men's)

7/-14

Coreloft Continuous

140 g/m²

N70p Gore Thermium

 

Arc'teryx Sensa Parka [NEW] (Women's)

7/-14

Coreloft Compact

120 g/m²

NP100d Gore-Tex 2L

 

Patagonia Macro Puff (Men's - Women's)

8/-13

PlumaFill

135 grams in body, 90 grams in arms and sides

10D Recycled nylon ripstop

Read Review

Arc'teryx Atom AR (Men's - Women's)

10/-12

Coreloft Continuous

120 g/m² body, 80 g/m² under-arms, 60 g/m² hood

30D Tyono

Read Review

Outdoor Research Refuge (Men's - Women's)

10/-12

VerticalX

60 g

20D x 30D Nylon ripstop

 

Arc'teryx Nuclei FL (Men's - Women's)

19/-7

Coreloft Continuous

65 g/m²

Arato 10r

Read Review

Black Diamond First Light Stretch (Men's - Women's)

21/-6

PrimaLoft Silver Active

60 g

Stretch nylon

 

Rab Xenon (Men's - Women's)

23/-5

Stratus

60 g

Atmos ripstop

 

Arc'teryx Atom LT (Men's - Women's)

23/-5

Coreloft Continuous

60 g/m²

20D Tyono

Read Review

Arc'teryx Proton LT (Men's - Women's)

24/-4

Coreloft Compact

80 g/m² body and arms, 60 g/m² hood

Fortius Air 20

Read Review

Patagonia Micro Puff (Men's - Women's)

24/-4

PlumaFill

65 g

Perfex Quantum

Read Review

The North Face Summit L3 Ventrix 2.0 (Men's - Women's)

24/-4

Ventrix

60 g

40D x 30D + 20D Nylon

 

Patagonia Nano Puff (Men's - Women's)

28/-2

PrimaLoft Gold Insulation Eco

60 g

22D Polyester

Read Review

Mountain Hardwear Kor Strata (Men's - Women's)

30/-1

Primaloft Gold Active

50 g/m²

20D Nylon ripstop

 

Patagonia Nano Air (Men's - Women's)

32/0

FullRange

60 g

33D Nylon ripstop

Read Review

Arc'teryx Proton FL (Men's - Women's)

43/6

Octa Loft

Cell

Fortius Air 20

Read Review

Arc'teryx Atom SL (Men's - Women's)

50/10

Coreloft Compact

40 g/m²

20D Tyono

Read Review

 

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. 

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 enough wind to cause an umbrella to twist in your hand, 
  • and when it's dry out.

If you think you run warmer or colder than the average person, then shift temperature ranges accordingly.

Arc'teryx & Patagonia only

As most of you know, these two are my top two brands, which is why I decided to devote a table entirely to their own. 

  • Lowest temperatures you can wear these jackets without feeling uncomfortably cold are...

 

°F / °C

Insulation

 

Arc'teryx LEAF Cold WX Parka SVX (Men's)

-40/-40

Down

 

Arc'teryx Ceres SV (Men's)

-15/-26

Down

Read Review

Arc'teryx Firebee AR (Men's - Women's)

-10/-23

Down

Read Review

Arc'teryx Dually Belay Parka (Men's)

-7/-22

Synthetic

 

Arc'teryx Thorsen Parka (Men's)

-7/-22

Down

Read Review

Patagonia Frozen Range Parka (Men's - Women's)

-6/-21

Down

Read Review

Arc'teryx Centrale (Women's)

-5/-20

Down

Read Review

Arc'teryx Cerium SV (Men's - Women's)

-5/-20

Down

Read Review

Arc'teryx Piedmont [NEW] (Men's)

-2/-19

Down

 

Arc'teryx Therme Parka (Men's)

-2/-19

Down

Read Review

Patagonia City Storm Parka (Men's - Women's)

0/-18

Down

Read Review

Arc'teryx Camosun Parka (Men's)

0/-18

Down

Read Review

Arc'teryx Fission SV (Men's - Women's)

3/-16

Synthetic

Read Review

Arc'teryx Radsten Parka [NEW] (Men's)

3/-16

Synthetic

 

Patagonia Tres 3-in-1 Parka (Men's - Women's)

3/-16

Down

Read Review

Arc'teryx Patera Parka (Women's)

5/-15

Down

Read Review

Arc'teryx Radsten Insulated [NEW] (Men's)

7/-14

Synthetic

 

Arc'teryx Kappa (Men's)

7/-14

Synthetic

 

Arc'teryx Sensa Parka [NEW] (Women's)

7/-14

Synthetic

 

Patagonia Macro Puff (Men's - Women's)

8/-13

Synthetic

 

Arc'teryx Thorium AR (Men's - Women's)

8/-13

Down

Read Review

Arc'teryx Atom AR (Men's - Women's)

10/-12

Synthetic

Read Review

Patagonia Vosque 3-in-1 Parka (Women's)

10/-12

Down

Read Review

Patagonia Jackson Glacier (Men's - Women's)

12/-11

Down

Read Review

Patagonia Hi Loft Down (Men's - Women's)

14/-10

Down

Read Review

Arc'teryx Magnus Coat (Men's)

14/-10

Down

 

Arc'teryx Cerium LT (Men's - Women's)

17/-8

Down

Read Review

Patagonia Down Sweater (Men's - Women's)

19/-7

Down

Read Review

Arc'teryx Nuclei FL (Men's - Women's)

19/-7

Synthetic

Read Review

Arc'teryx Atom LT (Men's - Women's)

23/-5

Synthetic

Read Review

Arc'teryx Proton LT (Men's - Women's)

24/-4

Synthetic

Read Review

Patagonia Micro Puff (Men's - Women's)

24/-4

Synthetic

Read Review

Patagonia Silent Down (Men's - Women's)

26/-3

Down

 

Patagonia Nano Puff (Men's - Women's)

28/-2

Synthetic

Read Review

Patagonia Nano Air (Men's - Women's)

32/0

Synthetic

Read Review

Arc'teryx Cerium SL (Men's - Women's)

40/5

Down

Read Review

Arc'teryx Proton FL (Men's - Women's)

43/6

Synthetic

Read Review

Arc'teryx Atom SL (Men's - Women's)

50/10

Synthetic

Read Review

   Read more about this chart here in my Insulated Outerwear Temperature Ratings Guide.

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 enough wind to cause an umbrella to twist in your hand, 
  • and when it's dry out.

If you think you run warmer or colder than the average person, then shift temperature ranges accordingly. 

Also check out my Arc'teryx Favorites and my Patagonia Favorites. 

If you're interested in down jackets only, see my Best Down Jackets post. 

Full list

Full temperature rating list of all high quality insulated jackets. 

  • Complete Data Set: Temperature Ratings

Approximate lowest temperatures you can wear each down jacket in the market without feeling uncomfortably cold are... 

 

°F / °C

Insulation

 

Arc'teryx LEAF Cold WX Parka SVX (Men's)

-40/-40

Down

 

Arc'teryx Ceres SV (Men's)

-15/-26

Down

Read Review

Arc'teryx Firebee AR (Men's - Women's)

-10/-23

Down

Read Review

Arc'teryx Thorsen Parka (Men's)

-7/-22

Down

Read Review

Arc'teryx Dually Belay Parka (Men's)

-7/-22

Synthetic

 

Patagonia Frozen Range Parka (Men's - Women's)

-6/-21

Down

Read Review

Arc'teryx Centrale (Women's)

-5/-20

Down

Read Review

Rab Neutrino Pro (Men's - Women's)

-5/-20

Down

 

Arc'teryx Cerium SV (Men's - Women's)

-5/-20

Down

Read Review

Arc'teryx Piedmont [NEW] (Men's)

-2/-19

Down

 

Arc'teryx Therme Parka (Men's)

-2/-19

Down

Read Review

Mountain Equipment Lightline (Men's - Women's)

-2/-19

Down

 

Patagonia City Storm Parka (Men's - Women's)

0/-18

Down

Read Review

Arc'teryx Camosun Parka (Men's)

0/-18

Down

Read Review

Arc'teryx Fission SV (Men's - Women's)

3/-16

Synthetic

 

Arc'teryx Radsten Parka [NEW] (Men's)

3/-16

Synthetic

 

Patagonia Tres 3-in-1 Parka (Men's - Women's)

3/-16

Down

Read Review

Outdoor Research Alpine Down (Men's - Women's)

3/-16

Down

 

Arc'teryx Patera Parka (Women's)

5/-15

Down

Read Review

Rab Nimbus (Men's - Women's)

5/-15

Synthetic

 

Mountain Equipment Skyline (Men's - Women's)

5/-15

Down

 

Arc'teryx Radsten Insulated [NEW] (Men's)

7/-14

Synthetic

 

Rab Microlight Alpine (Men's - Women's)

7/-14

Down

 

Arc'teryx Kappa (Men's)

7/-14

Synthetic

 

Arc'teryx Sensa Parka [NEW] (Women's)

7/-14

Synthetic

 

Patagonia Macro Puff (Men's - Women's)

8/-13

Down

Read Review

Feathered Friends Eos (Men's - Women's)

8/-13

Down

 

Arc'teryx Thorium AR (Men's - Women's)

8/-13

Down

Read Review

Arc'teryx Atom AR (Men's - Women's)

10/-12

Synthetic

Read Review

Patagonia Vosque 3-in-1 Parka (Women's)

10/-12

Down

Read Review

Outdoor Research Refuge (Men's - Women's)

10/-12

Synthetic

 

Patagonia Jackson Glacier (Men's - Women's)

12/-11

Down

Read Review

Arc'teryx Magnus Coat (Men's)

14/-10

Down

 

Patagonia Hi Loft Down (Men's - Women's)

14/-10

Down

Read Review

REI Co-op Magma 850 Hoodie 2.0 (Men's - Women's)

14/-10

Down

 

Black Diamond Access Down (Men's - Women's)

16/-9

Down

 

Arc'teryx Cerium LT (Men's - Women's)

17/-8

Down

Read Review

Patagonia Down Sweater (Men's - Women's)

19/-7

Down

Read Review

Arc'teryx Nuclei FL (Men's - Women's)

19/-7

Synthetic

Read Review

Black Diamond First Light Stretch (Men's - Women's)

21/-6

Synthetic

 

Arc'teryx Atom LT (Men's - Women's)

23/-5

Synthetic

Read Review

Rab Xenon (Men's - Women's)

23/-5

Synthetic

 

Arc'teryx Proton LT (Men's - Women's)

24/-4

Synthetic

Read Review

Patagonia Micro Puff (Men's - Women's)

24/-4

Synthetic

Read Review

The North Face Summit L3 Ventrix 2.0 (Men's - Women's)

24/-4

Synthetic

 

Patagonia Silent Down (Men's - Women's)

26/-3

Down

Read Review

Outdoor Research Transcendent (Men's - Women's)

26/-3

Down

 

Patagonia Nano Puff (Men's - Women's)

28/-2

Synthetic

Read Review

Mountain Hardwear Ghost Whisperer/2 (Men's - Women's)

28/-2

Down

 

Mountain Hardwear Kor Strata (Men's - Women's)

30/-1

Synthetic

 

Outdoor Research Illuminate (Men's - Women's)

30/-1

Down

 

Patagonia Nano Air (Men's - Women's)

32/0

Synthetic

Read Review

Marmot Ares (Men's)

32/0

Down

 

Arc'teryx Cerium SL (Men's - Women's)

40/5

Down

Read Review

Arc'teryx Proton FL (Men's - Women's)

43/6

Synthetic

Read Review

Arc'teryx Atom SL (Men's - Women's)

50/10

Synthetic

Read Review

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 enough wind to cause an umbrella to twist in your hand, 
  • and when it's dry out.

If you think you run warmer or colder than the average person, then shift temperature ranges accordingly. 

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. 

Supporting documents

Some manufacturers don't reveal vital product information such as fill weight or even fill power at times. 

This is why I had to make some calls and send some mails to access them. I thought that it could be helpful for some of you guys to share the written documents with you. 

Unfortunately I'm unable to report the results of verbal communication that took place through phone calls. 


I hope this post was helpful for you to learn more about the jacket(s) in your mind.


Feel free to ask me any questions or provide feedback and I'll be happy to respond in the comment section below.


Guide: Insulated & Shell Jackets

Start here:

  • Best Arc'teryx Jackets: My Top Picks
  • Best Patagonia Jackets: My Top Picks
  • Best Down Jackets: My Top Picks
  • Best Synthetic Insulated Jackets: My Top Picks
  • Temperature Ratings of Best Insulated Jackets

Complete list:

  • All Arc'teryx Shell Jackets sorted by performance
  • All Arc'teryx Ski Jackets sorted by performance
  • All Patagonia Ski Jackets sorted by performance
  • All Patagonia Winter Jackets compared
  • All Patagonia Fleeces compared
  • All Patagonia Rain Jackets compared
  • All Patagonia Down Jackets compared

Synthetic Insulated Jackets

  • Arc'teryx Proton LT
  • Patagonia Nano Air
  • Arc'teryx Atom LT
  • Arc'teryx Atom AR
  • Patagonia Nano Puff
  • Patagonia Micro Puff
  • Arc'teryx Atom SL
  • Arc'teryx Proton FL
  • Arc'teryx Fission SV

Down Jackets

  • Arc'teryx Cerium LT
  • Arc'teryx Cerium SV
  • Arc'teryx Cerium SL
  • Arc'teryx Thorium AR
  • Patagonia Down Sweater
  • Arc'teryx Firebee AR
  • Arc'teryx Ceres SV

Parkas

  • Arc'teryx Thorsen
  • Arc'teryx Therme
  • Arc'teryx Camosun
  • Arc'teryx Patera
  • Arc'teryx Centrale
  • Patagonia Tres
  • Patagonia Vosque

Shell Jackets

  • Arc'teryx Beta SV
  • Arc'teryx Beta LT
  • Arc'teryx Beta AR
  • Arc'teryx Alpha AR
  • Arc'teryx Alpha SV
  • Arc'teryx Gamma MX
  • Arc'teryx Gamma LT
  • Arc'teryx Gamma SL

Ski Jackets

  • Arc'teryx Rush
  • Arc'teryx Rush IS
  • Arc'teryx Sabre LT
  • Arc'teryx Sabre AR
  • Arc'teryx Cassiar
  • Arc'teryx Sidewinder
  • Arc'teryx Macai

Fleece Jackets

  • Patagonia R1
  • Patagonia R2
  • Patagonia Synchilla
  • Patagonia Better Sweater

Wind Jackets

  • Arc'teryx Solano
  • Arc'teryx Nuclei FL
  • Patagonia Houdini
  • Patagonia Houdini Air
  • Arc'teryx Squamish
  • Arc'teryx Incendo

Rain Jackets

  • Patagonia Torrentshell
  • Patagonia Torrentshell Insulated
  • Arc'teryx Beta SL
  • Arc'teryx Zeta
  • Bonus: List of Manufacturing Facilities of all Arc'teryx Jackets

Thank you for reading!

Filed Under: Insulated Jackets Tagged With: jackets, jackets temperature ratings

Reader Interactions

Comments

  1. Brandon says

    February 21, 2020 at 4:45 pm

    Where’s Fission SV fitting in this warmth chart?

    Reply
    • Canberk Köksal says

      February 21, 2020 at 5:05 pm

      Hi Brandon, Fission SV is added to chart.

      Because my site is using a cache, you might not be able to see the updated chart when you refresh this page. In that case, try reloading the page through Shift + F5 keyboard shortcut.

      Hope this helps.

      Reply
  2. Benoit says

    April 19, 2020 at 11:15 am

    Where would you put the macro puff hoody in the chart?

    Reply
    • Canberk Koksal says

      April 19, 2020 at 3:34 pm

      Thank you for your comment Benoit! Macro Puff is just added into the chart.

      Reply
  3. Stuart says

    August 31, 2020 at 5:03 pm

    Hi, I was just wondering if/when you may be able to include the new Patagonia DAS Light Hoody and the re-released Patagonia DAS Parka on the charts above..?

    Additionally, I noticed that you included the OR Refuge, but any chance that the Refuge Air will be included as well? Just curious.

    Thanks!

    Reply
  4. Stuart says

    September 3, 2020 at 6:50 pm

    Hi, I was wondering if you would be able to rank/add Patagonia’s new DAS Light Hoody and re-released DAS Parka to the list…?

    Additionally, while you did include the OR Refuge, just out of curiosity, where would the OR Refuge Air sit on the list?

    Thanks!

    Reply
  5. Kristine says

    November 22, 2020 at 6:38 pm

    Hi. I’m not seeing wool blend options in this lineup. How would something like Icebreaker’s Stratus (180g merinoloft) compare to down/synthetic as far as warmth?

    Reply
  6. fernando says

    November 27, 2020 at 9:48 am

    Hi from spain, first of all thanks for your wonderful page.

    Do you know the Outdoor Research Ascendant?
    In what temperature range is it?
    Like the atom lt?
    Thank you!!

    Reply
    • Canberk says

      November 27, 2020 at 12:12 pm

      Thank you for your comment and kind words Fernando.

      I was going to review the Ascendant, but then I couldn’t find the product page of its men’s version at outdoorresearch.com. Seems like the only available option now is women’s counterpart.

      Do you know what happened to the men’s version? I contacted the OR about this and now waiting for their response.

      Reply
  7. Alexander says

    December 7, 2020 at 12:32 am

    There’s an error in your math in the example of Eos versus Transcendent. 141 x 700 is over 98000, much more than what you state, and more than Eos.

    Also, if you converted to ounces your calculations would have units of cubic inches rather than some odd cu. In. * Gram / Oz

    Otherwise looks like a good resource and looking forward to reading through all this.

    Reply
    • Canberk says

      December 8, 2020 at 12:37 pm

      Thank you for your comment Alexander!

      That’s a great catch, thank you for paying attention to the post. The incorrect numbers of the calculation was actually the “141 x 700”, though. The correct values for the Transcendent are 116 x 650 (source: https://www.outdoorresearch.com/us/mens-transcendent-down-hoodie-268084#eyJvcl9zaXplIjoiNzIifQ__) as mentioned.

      The typo is now fixed, but the placements and results stay the same. You might not be able to see the edited version of the page right away. Because my site uses caching, and it might take a few days until it’s purged.

      I’ll check out your comments about the units and will make edits accordingly.

      Glad you found this post helpful.

      Thanks!

      Reply
  8. Andrew says

    December 10, 2020 at 8:15 pm

    Rab has now changed their 750 down in the Microlight Alpine to a 700 totally recycled down. This is from their site:

    “Insulation: Recycled 700 fill-power down Nikwax hydrophobic (water-resistant) finish (153g Size L)”

    The old jacket was :

    “750FP R.D.S Certified European Goose Down (143g/5oz in Size L)”

    Thanks for this great information!

    Reply
  9. zhaoyuan miao says

    December 17, 2020 at 6:47 pm

    Thank you for the depth review. Helps a lot. I hope there is a donation button to appreciate your hard work and researching

    Reply
    • Canberk says

      December 23, 2020 at 11:59 am

      Glad it was helpful for you.

      Yes, you can this donation button: https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=EVA3S7ME6LZB6&currency_code=USD

      I’m flattered, appreciate it, thanks!

      Reply
  10. Jc says

    December 27, 2020 at 5:23 pm

    I mean great article. This is how everything should be written. As much info as possible.
    I’d say the only thing missing is how down fill powder is created/made. I’m very curious how a duck feather can go from 600 to 850fp. Is it a different part of the feather or do they do something to the feather. I would love to see that added to this Article.

    Reply
    • Canberk says

      December 28, 2020 at 12:55 pm

      Glad to hear it was helpful for you JC.

      They don’t do anything to the feather. It’s all natural. In most cases, the difference is mostly due to the genetics of ducks.

      Reply
  11. Michael Kyle says

    January 6, 2021 at 6:27 am

    I Don, t see anything from the Canada goose line in any list, just wondering why?

    Reply
    • Canberk says

      January 6, 2021 at 8:06 am

      Currently I’m on this. Gathering information, analyzing products, etc. They’ll be added soon.

      Reply

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Hey, what's up? Canberk here. Nomad, gym rat, Starbucks addict and Tame Impala fan of OutdoorCrunch Team. Here's more about me.

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