In summary, the CLO value of synthetic insulation shows you how warm your jacket is. Sure, it’s not the only parameter affecting your warmth. But, almost the most important one and, unfortunately, the hardest to achieve... Because producers rarely share CLO values for their items. And trying to find them on the Internet is really time-consuming. So I decided to create a detailed table with publicly available CLO values of synthetic insulations. Also, I calculated these values for insulated jackets made of them.
If you need more info about synthetic insulations’ CLO values and other characteristics, keep reading it.
Important note: CLO values of synthetic insulators are based on several forums and manufacturers' technical data sheets. And they aren't the results of scientific studies.
Remember that jacket's other features like shell fabric, bagginess, and length might also affect your warmth. Plus, your thermal comfort can vary on your metabolic rate, activity level, and weather conditions.
For more information, see my other article.
Name Insulation Material Claimed CLO (clo/oz/yd2) Insulation Amount (oz/yd2) Calculated CLO Patagonia Nano Puff Hoody (Men's - Women's) PrimaLoft Gold Eco 0.92 1.77 1.63 M W No Mountain Hardwear Kor Strata™ Hoody (Men's - Women's) PrimaLoft Gold Active 0.81 1.77 1.43 M W No Rab Xenair Alpine Light Insulated Jacket (Men's - Women's) PrimaLoft Gold Active + M W No Rab Generator Alpine Jacket (Men's) Primaloft Gold Active + with Cross Core Techn. M No Ternua Belay Jacket (Men's - Women's) PrimaLoft Gold Luxe 0.99 3.54 3.50 M W No Mountain Equipment Citadel Jacket (Men's) PrimaLoft Gold Hi-Loft Ultra with Cross Core Techn. 0.93 4.25 3.95 M No L.L. Bean PrimaLoft Packaway Jacket (Men's - Women's) PrimaLoft Gold with Cross Core Techn. 1.40 1.77 2.48 M W No Patagonia DAS Parka (Men's - Women's) PrimaLoft Gold Eco with Cross Core Techn. 1.40 3.65 5.11 M W No Rab Xenon 2.0 Insulated Jacket (Men's - Women's) PrimaLoft Silver 0.79 1.77 1.40 M W No REI Co-op Flash Insulated Jacket (Men's - Women's) PrimaLoft Silver Eco 0.68 1.77 1.20 M W No Black Diamond First Light Stretch Hoody (Men's - Women's) PrimaLoft Silver Active 0.82 1.77 1.45 M W No Houdini Fall-in Parka (Men's - Women's) PrimaLoft Silver Hi-Loft Ultra 0.81 3.36 2.72 M W No Mountain Hardwear Ghost Shadow™ Hoody (Men's - Women's) PrimaLoft Silver Hi-Loft Ultra 0.81 2.36 1.91 M W No Montane Ground Control Jacket (Men's - Women's) PrimaLoft Silver Thermoplume with Cross Core Techn. + PL Silver 0.95 4.89 4.65 M W No Marmot Variant Hybrid Hoody (Men's - Women's) PrimaLoft Black Eco 0.65 1.77 1.15 M W No Montane Icarus Jacket (Men's) PrimaLoft Black Thermoplume 0.85 6.05 5.14 M No Montane Phoenix Jacket (Women's) PrimaLoft Black Thermoplume 0.85 3.83 3.26 W No UBR Regulator Parka (Men's) Primaloft Innovation M No Helly Hansen Lifaloft Air Insulator Jacket (Men's - Women's) Lifaloft (Primaloft & Helly Hansen) M W No The North Face ThermoBall Eco Jacket 2.0 (Men's - Women's) ThermoBall Eco (Primaloft & The North Face) M W No Enlightened Equipment Torrid Apex Jacket (Men's - Women's) Climashield APEX 0.82 2.00 1.64 M W No Arc'teryx Nuclei FL Jacket (Men's - Women's) Coreloft Continuous (a.k.a. Climashield APEX) 0.82 1.92 1.57 M W No Arc'teryx Axis Insulated Jacket (Men's) Coreloft Continuous (a.k.a. Climashield APEX) 0.82 1.92 1.57 M No Arc'teryx Dually Belay Parka (Men's) Thermatek (a.k.a. Climashield PRISM) 0.76 5.43 4.13 M No Arc'teryx LEAF Cold WX Hoody LT Gen 2 (Men's) Climashield PRISM 0.76 3.00 2.28 M No Arc'teryx LEAF Atom LT Hoody Gen 2 (Men's) Climashield COMBAT + Pontetorto Hardface Fleece M No Direct Alpine Foraker 3.0 Insulated Jacket (Men's) Climashield HL 0.73 3.61 2.64 M No Hypen Sports Riffel Hybrid Jacket (Men's) Climashield CONTUR 1.57 2.65 4.16 M No Arc'teryx Atom SL Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 0.65 1.18 0.77 M W No Arc'teryx Atom LT Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 0.65 1.77 1.15 M W No Arc'teryx Proton LT Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 0.65 2.27 1.48 M W No Arc'teryx Therme Insulated Jacket (Men's) Coreloft Compact (a.k.a. Thermore Classic) 0.65 2.36 1.53 M No Arc'teryx Atom AR Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 0.65 2.95 1.92 M W No Arc'teryx Radsten Insulated Jacket (Men's) Coreloft Compact (a.k.a. Thermore Classic) 0.65 3.54 2.30 M No Patagonia Nano-Air Hoody (Men's - Women's) FullRange (a.k.a. Toray 3DeFX+) 0.83 1.77 1.47 M W No Dynafit Free Alpha Direct Jacket (Men's - Women's) Polartec Alpha Direct 0.38 2.65 1.01 M W No Mont-bell Thermawrap Pro (Men's - Women's) Exceloft 0.68 2.36 1.60 M W No Marmot Avant Featherless Hoody (Men's - Women's) 3M Thinsulate Featherless (Type FL700) M W No Patagonia Micro Puff Hoody (Men's - Women's) PlumaFill 0.90 1.92 1.73 M W No Patagonia Macro Puff Hoody (Men's - Women's) PlumaFill 0.90 3.45 3.11 M W No Patagonia DAS Light Hoody (Men's - Women's) PlumaFill 0.90 1.92 1.73 M W No Outdoor Research Shadow Hoodie (Men's - Women's) VerticalX ECO SR M W No Arc'teryx Proton FL Hoody (Men's - Women's) Octa Loft M W No Arc'teryx Practicioner AR Hoody (Men's - Women's) Octa Loft M W No Fjallraven Keb Padded Hoodie (Men's - Women's) G-Loft Supreme M W No Haglofs V Series Mimic Hooded Jacket (Men's - Women's) Mimic PLATINUM Ultracluster Graphene M W No Norrøna Falketind Thermo60 Hood (Men's - Women's) thermo60 M W No Mammut Rime IN Flex Hooded Jacket (Men's - Women's) Ajungilak OTI Stretch 0.83 2.09 1.73 M W No Cotopaxi Teca Cálido Hooded Jacket (Men's - Women's) Recycled polyester M W No Patagonia Vosque 3-in-1 Parka (Women's) Thermolite ECO92 W No Patagonia Isthmus Jacket (Men's) Thermogreen polyester M No
Synthetic Insulations
Synthetic insulators are typically designed to mimic down's properties.
Ultra-fine fibers in their structure create heat-trapping air pockets, keeping your body heat... though not as good as natural fillings [1].
But, when it comes to water resistance, they don't collapse and lose their insulating power when wet, unlike down jackets. Also, their drying time is shorter.
So, I'd say synthetic insulated jackets might be good choices for damp conditions or high-output activities. And, you can clean them easier than those with down.
Plus, they're more affordable and hypoallergenic. But still, keep in mind that synthetic jackets are less packable and heavier than down ones.
Name Insulation Material Price (USD) Jacket's Weight (oz) Fit Center Back Length (inch) Number of Pockets Patagonia Nano Puff Hoody (Men's - Women's) PrimaLoft Gold Eco 249 12.8 Regular 27.75 3 M W No Mountain Hardwear Kor Strata™ Hoody (Men's - Women's) PrimaLoft Gold Active 220 14.1 Trim 27.50 3 M W No Rab Xenair Alpine Light Insulated Jacket (Men's - Women's) PrimaLoft Gold Active + 200 10.3 Regular 28.10 3 M W No Rab Generator Alpine Jacket (Men's) Primaloft Gold Active + with Cross Core Techn. 320 19.0 Regular 31.50 5 M No Ternua Belay Jacket (Men's - Women's) PrimaLoft Gold Luxe 278.5 13.6 Regular Unavail. 2 M W No Mountain Equipment Citadel Jacket (Men's) PrimaLoft Gold Hi-Loft Ultra with Cross Core Techn. 450 28.9 Boxy 30.30 6 M No L.L. Bean PrimaLoft Packaway Jacket (Men's - Women's) PrimaLoft Gold with Cross Core Techn. 169 12.3 Slightly Fitted 28.00 4 M W No Patagonia DAS Parka (Men's - Women's) PrimaLoft Gold Eco with Cross Core Techn. 449 19.6 Regular Unavail. 5 M W No Rab Xenon 2.0 Insulated Jacket (Men's - Women's) PrimaLoft Silver 180 13.6 Regular 30.70 3 M W No REI Co-op Flash Insulated Jacket (Men's - Women's) PrimaLoft Silver Eco 149 11.3 Regular 28.75 4 M W No Black Diamond First Light Stretch Hoody (Men's - Women's) PrimaLoft Silver Active 260 16.0 Regular 28.50 3 M W No Houdini Fall-in Parka (Men's - Women's) PrimaLoft Silver Hi-Loft Ultra 650 31.5 Relaxed 36.20 6 M W No Mountain Hardwear Ghost Shadow™ Hoody (Men's - Women's) PrimaLoft Silver Hi-Loft Ultra 220 11.9 Standard 27.50 2 M W No Montane Ground Control Jacket (Men's - Women's) PrimaLoft Silver Thermoplume with Cross Core Techn. + PL Silver 230 20.5 Active Mountain Unavail. 3 M W No Marmot Variant Hybrid Hoody (Men's - Women's) PrimaLoft Black Eco 215 13.4 Athletic 27.00 3 M W No Montane Icarus Jacket (Men's) PrimaLoft Black Thermoplume 195 21.3 Active Mountain Unavail. 3 M No Montane Phoenix Jacket (Women's) PrimaLoft Black Thermoplume 195 16.9 Active Mountain Unavail. 3 W No UBR Regulator Parka (Men's) Primaloft Innovation 895 33.5 Regular 34.00 3 M No Helly Hansen Lifaloft Air Insulator Jacket (Men's - Women's) Lifaloft (Primaloft & Helly Hansen) 295 15.9 Trim 28.75 5 M W No The North Face ThermoBall Eco Jacket 2.0 (Men's - Women's) ThermoBall Eco (Primaloft & The North Face) 199 9.5 Slim 27.50 3 M W No Enlightened Equipment Torrid Apex Jacket (Men's - Women's) Climashield APEX 185 9.2 Regular 29.00 2 M W No Arc'teryx Nuclei FL Jacket (Men's - Women's) Coreloft Continuous (a.k.a. Climashield APEX) 299 11.5 Trim 29.50 4 M W No Arc'teryx Axis Insulated Jacket (Men's) Coreloft Continuous (a.k.a. Climashield APEX) 650 22.4 Regular 27.20 5 M No Arc'teryx Dually Belay Parka (Men's) Thermatek (a.k.a. Climashield PRISM) 625 25.1 Expedition 33.10 4 M No Arc'teryx LEAF Cold WX Hoody LT Gen 2 (Men's) Climashield PRISM 422 24.0 Unavail. Unavail. 5 M No Arc'teryx LEAF Atom LT Hoody Gen 2 (Men's) Climashield COMBAT + Pontetorto Hardface Fleece 279 16.0 Unavail. Unavail. 3 M No Direct Alpine Foraker 3.0 Insulated Jacket (Men's) Climashield HL 349.95 21.9 Regular Unavail. 6 M No Hypen Sports Riffel Hybrid Jacket (Men's) Climashield CONTUR 299.95€ 16.8 Unavail. Unavail. 3 M No Arc'teryx Atom SL Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 229 9.5 Trim 29.10 2 M W No Arc'teryx Atom LT Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 259 13.2 Trim 29.10 3 M W No Arc'teryx Proton LT Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 299 13.2 Trim 29.40 3 M W No Arc'teryx Therme Insulated Jacket (Men's) Coreloft Compact (a.k.a. Thermore Classic) 599 27.0 Regular 28.30 4 M No Arc'teryx Atom AR Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 299 16.8 Regular 29.10 3 M W No Arc'teryx Radsten Insulated Jacket (Men's) Coreloft Compact (a.k.a. Thermore Classic) 575 25.2 Regular 28.75 4 M No Patagonia Nano-Air Hoody (Men's - Women's) FullRange (a.k.a. Toray 3DeFX+) 299 12.2 Slim Unavail. 3 M W No Dynafit Free Alpha Direct Jacket (Men's - Women's) Polartec Alpha Direct 199.95 10.9 Slim 28.50 3 M W No Mont-bell Thermawrap Pro (Men's - Women's) Exceloft 219 15.1 Regular 28.00 4 M W No Marmot Avant Featherless Hoody (Men's - Women's) 3M Thinsulate Featherless (Type FL700) 225 17.0 Regular 27.00 4 M W No Patagonia Micro Puff Hoody (Men's - Women's) PlumaFill 299 9.3 Regular 30.00 4 M W No Patagonia Macro Puff Hoody (Men's - Women's) PlumaFill 399 15.0 Regular 31.00 5 M W No Patagonia DAS Light Hoody (Men's - Women's) PlumaFill 329 11.3 Regular 30.50 3 M W No Outdoor Research Shadow Hoodie (Men's - Women's) VerticalX ECO SR 199 16.7 Standard 29.00 4 M W No Arc'teryx Proton FL Hoody (Men's - Women's) Octa Loft 260 12.1 Trim 28.30 3 M W No Arc'teryx Practicioner AR Hoody (Men's - Women's) Octa Loft 299 16.8 Trim 29.10 4 M W No Fjallraven Keb Padded Hoodie (Men's - Women's) G-Loft Supreme 250 18.0 Regular 29.50 4 M W No Haglofs V Series Mimic Hooded Jacket (Men's - Women's) Mimic PLATINUM Ultracluster Graphene 240€ 13.4 Regular 30.70 4 M W No Norrøna Falketind Thermo60 Hood (Men's - Women's) thermo60 269 14.0 Technical 29.00 3 M W No Mammut Rime IN Flex Hooded Jacket (Men's - Women's) Ajungilak OTI Stretch 269 16.9 Regular 28.70 3 M W No Cotopaxi Teca Cálido Hooded Jacket (Men's - Women's) Recycled polyester 150 13.2 Regular 28.75 7 M W No Patagonia Vosque 3-in-1 Parka (Women's) Thermolite ECO92 449 48.0 Slim 35.50 11 W No Patagonia Isthmus Jacket (Men's) Thermogreen polyester 199 31.6 Regular 27.50 5 M No
How Warm Are Synthetic Insulated Jackets?
Truth be told, it's pretty tough to tell how warm a synthetic insulated jacket is.
For a start, I'd say you'll need more synthetic insulation than natural down to achieve the same warmth. It means your ultra-warm synthetic jacket will likely be heavier than its down counterpart.
Of course, you'll want to wear lightweight synthetic jackets during high-intensity activities. To offset the weight, some brands use lighter insulations in their jackets, like 40 g/m². Or only in the jacket's sleeves, hood, and neck.
These active insulation jackets sacrifice a little warmth but still can work great trapping air. Also, they're remarkably breathable. My best picks in this category are Arc'teryx Proton LT and Patagonia Nano-Air.
What is a CLO?
CLO value is an important factor in determining a synthetic jacket’s warmth. Metaphorically, like FP * FW value in down jackets…And the higher the value is, the warmer the insulation is.
Synthetic insulators provide more insulation per thickness. This is why any insulation can achieve desired CLO value after setting the right amount of thickness. But of course, your jacket will become heavier in the end.
Manufacturers rarely share the CLO values of their products. Let's say they disclosed these values; which standard did they use to measure them? To correctly be able to compare them, this info is also crucial.
Against all odds, I combed through the CLO values of synthetic insulators. And, to give you some ideas about jackets' warmth, I've prepared a detailed table.
But, I'd like to point out that I got the values from forums like Reddit and producers' technical data sheets and catalogs. That is, they aren't based on scientific investigations and aren't totally reliable.
In the table, you'll see some calculations related to synthetic insulated jackets. For example, the Patagonia Nano Puff Hoody contains the Primaloft Gold Eco having 0.92 clo/oz/yd². And the jacket's insulation amount is 1.77 oz/yd². So,
Calculated CLO of Patagonia Nano Puff Hoody = 0.92 x 1.77 = 1.63
As I said earlier, some jackets have different insulation weights on various parts. So, I calculated the CLO values considering the percentage of their body surface area covered [2].
Synthetic Insulation Types
There are three major categories of nonwoven insulations: Short-staple, continuous filament, and cluster fiber. Also, it's possible to knit synthetic insulations.
Nonwoven Insulations
Short-staple insulation
These insulators feature densely packed short fibers to trap air and keep your body heat. But, the fibers can move around and form cold spots.
Short-staple fillings provide a soft feeling. They're compressible and have good warmth-to-weight performance. But, they can lose their insulating ability faster than other synthetic ones. Meaning that you might need a new jacket after a while.
PrimaLoft, Coreloft Compact, and Thinsulate are examples of short-staple insulation.
Continuous filament insulation
These insulations are made from continuous filament fibers.
They’re stiffer and less packable than short-staple insulators. But, their web structure is more durable and retains loft longer.
Climashield, Coreloft Continuous, and PlumaFill are at the forefront of the market.
Cluster fiber insulation
There are small fiber tufts in this insulation type. They're designed for closely mimicking down to minimize heat loss.
The North Face ThermoBall Eco and Freudenberg comfortemp are examples.

The North Face ThermoBall [3]


Comfortemp® fiberball padding
Knitted Insulations
These insulations don't need to be quilted because they're self-supporting knitted structures. So, the jacket's outer layer doesn't have to be high-density to keep the insulation.
After all, the jackets with knitted insulators are highly breathable. That’s why they're convenient for high-output activities.
But, to put it bluntly, they won't offer excellent insulation performance.
Polartec, Octa Loft, and Pontetorto are well-known knit insulations.
Approximate lowest temperatures you can wear each down jacket in the market without feeling uncomfortably cold are...
Name Insulation Material Insulation Amount Est. Temp. (°F/°C) Review Patagonia Nano Puff Hoody (Men's - Women's) PrimaLoft Gold Eco 60 g 37/3 Review M W No Mountain Hardwear Kor Strata™ Hoody (Men's - Women's) PrimaLoft Gold Active 60 g Unknown M W No Rab Xenair Alpine Light Insulated Jacket (Men's - Women's) PrimaLoft Gold Active + 60 gsm + 40 gsm Testing M W No Rab Generator Alpine Jacket (Men's) Primaloft Gold Active + with Cross Core Techn. 133 gsm + 80 gsm Testing M No Ternua Belay Jacket (Men's - Women's) PrimaLoft Gold Luxe 120 g Unknown M W No Mountain Equipment Citadel Jacket (Men's) PrimaLoft Gold Hi-Loft Ultra with Cross Core Techn. 160 g + 80 g Unknown M No L.L. Bean PrimaLoft Packaway Jacket (Men's - Women's) PrimaLoft Gold with Cross Core Techn. 60 g Unknown M W No Patagonia DAS Parka (Men's - Women's) PrimaLoft Gold Eco with Cross Core Techn. 133 g + 40 g 5/-15 M W No Rab Xenon 2.0 Insulated Jacket (Men's - Women's) PrimaLoft Silver 60 gsm 23/-5 M W No REI Co-op Flash Insulated Jacket (Men's - Women's) PrimaLoft Silver Eco 60 g Unknown M W No Black Diamond First Light Stretch Hoody (Men's - Women's) PrimaLoft Silver Active 60 gsm Unknown M W No Houdini Fall-in Parka (Men's - Women's) PrimaLoft Silver Hi-Loft Ultra 120 gsm + 80 gsm Unknown M W No Mountain Hardwear Ghost Shadow™ Hoody (Men's - Women's) PrimaLoft Silver Hi-Loft Ultra 80 g Unknown M W No Montane Ground Control Jacket (Men's - Women's) PrimaLoft Silver Thermoplume with Cross Core Techn. + PL Silver 180 g + 133 g Unknown M W No Marmot Variant Hybrid Hoody (Men's - Women's) PrimaLoft Black Eco 60 g Unknown M W No Montane Icarus Jacket (Men's) PrimaLoft Black Thermoplume 205 g Unknown M No Montane Phoenix Jacket (Women's) PrimaLoft Black Thermoplume 130 g Unknown W No UBR Regulator Parka (Men's) Primaloft Innovation 120 Testing M No Helly Hansen Lifaloft Air Insulator Jacket (Men's - Women's) Lifaloft (Primaloft & Helly Hansen) 100 g Testing M W No The North Face ThermoBall Eco Jacket 2.0 (Men's - Women's) ThermoBall Eco (Primaloft & The North Face) 118.4 gsm Unknown M W No Enlightened Equipment Torrid Apex Jacket (Men's - Women's) Climashield APEX 68 gsm Unknown M W No Arc'teryx Nuclei FL Jacket (Men's - Women's) Coreloft Continuous (a.k.a. Climashield APEX) 65 gsm 32/0 Review M W No Arc'teryx Axis Insulated Jacket (Men's) Coreloft Continuous (a.k.a. Climashield APEX) 65 gsm Testing M No Arc'teryx Dually Belay Parka (Men's) Thermatek (a.k.a. Climashield PRISM) 184 gsm 0/-18 Review M No Arc'teryx LEAF Cold WX Hoody LT Gen 2 (Men's) Climashield PRISM 102 gsm Testing M No Arc'teryx LEAF Atom LT Hoody Gen 2 (Men's) Climashield COMBAT + Pontetorto Hardface Fleece 68 gsm + 213 gsm Testing M No Direct Alpine Foraker 3.0 Insulated Jacket (Men's) Climashield HL 136 gsm + 102 gsm Unknown M No Hypen Sports Riffel Hybrid Jacket (Men's) Climashield CONTUR 90 gsm Unknown M No Arc'teryx Atom SL Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 40 gsm 52/11 Review M W No Arc'teryx Atom LT Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 60 gsm 36/2 Review M W No Arc'teryx Proton LT Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 80 gsm + 60 gsm 37/3 Review M W No Arc'teryx Therme Insulated Jacket (Men's) Coreloft Compact (a.k.a. Thermore Classic) 80 gsm Testing Review M No Arc'teryx Atom AR Hoody (Men's - Women's) Coreloft Compact (a.k.a. Thermore Classic) 120 gsm + 80 gsm + 60 gsm 18/-8 Review M W No Arc'teryx Radsten Insulated Jacket (Men's) Coreloft Compact (a.k.a. Thermore Classic) 120 gsm 7/-14 M No Patagonia Nano-Air Hoody (Men's - Women's) FullRange (a.k.a. Toray 3DeFX+) 60 gsm 41/5 Review M W No Dynafit Free Alpha Direct Jacket (Men's - Women's) Polartec Alpha Direct 90 gsm Unknown M W No Mont-bell Thermawrap Pro (Men's - Women's) Exceloft 80 gsm Unknown M W No Marmot Avant Featherless Hoody (Men's - Women's) 3M Thinsulate Featherless (Type FL700) 254.2 g Unknown M W No Patagonia Micro Puff Hoody (Men's - Women's) PlumaFill 65 g 36/2 Review M W No Patagonia Macro Puff Hoody (Men's - Women's) PlumaFill 135 g + 90 g 8/-13 M W No Patagonia DAS Light Hoody (Men's - Women's) PlumaFill 65 g Testing M W No Outdoor Research Shadow Hoodie (Men's - Women's) VerticalX ECO SR 60 gsm Unknown M W No Arc'teryx Proton FL Hoody (Men's - Women's) Octa Loft 94 gsm 48/9 Review M W No Arc'teryx Practicioner AR Hoody (Men's - Women's) Octa Loft 98 gsm Testing M W No Fjallraven Keb Padded Hoodie (Men's - Women's) G-Loft Supreme 60 gsm Unknown M W No Haglofs V Series Mimic Hooded Jacket (Men's - Women's) Mimic PLATINUM Ultracluster Graphene 166 g Unknown M W No Norrøna Falketind Thermo60 Hood (Men's - Women's) thermo60 60 gsm Unknown M W No Mammut Rime IN Flex Hooded Jacket (Men's - Women's) Ajungilak OTI Stretch 80 gsm + 60 gsm Unknown M W No Cotopaxi Teca Cálido Hooded Jacket (Men's - Women's) Recycled polyester 60 gsm Unknown M W No Patagonia Vosque 3-in-1 Parka (Women's) Thermolite ECO92 100 g 10/-12 Review W No Patagonia Isthmus Jacket (Men's) Thermogreen polyester 100 g 36/2 M No
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.
What Kind of Synthetic Insulation is Best for You?
As I mentioned above, various synthetic insulation producers are on the market. And each brand features a lot of varieties in their product range.
Let’s look at the most widely used synthetic insulations in a little more detail.
After that, it is up to you to choose!
PrimaLoft
PrimaLoft is a well-known brand in short-staple insulation. It has three main categories: Gold, Silver, and Black.
And they've tons of subcategories...
PrimaLoft Gold insulators have the highest CLO values among others. And that way, they might maintain your warmth even in harsh weather.
Generally speaking, PrimaLoft Silver ones display slightly worse insulation performance. So I'd say they'll be appropriate for wearing in a little warmer climates.
And the PrimaLoft Black is the most basic insulation. You can opt for a jacket with this insulation for everyday use.
PrimaLoft also designs insulators in collaboration with some outdoor clothing brands. LifaLoft (Helly Hansen) and ThermoBall Eco (The North Face) are some of them.
By the way, I'd like to say I have been impressed with PrimaLoft's cross-core technology. The aerogel used could enhance your warmth without increasing your jacket's weight. Patagonia DAS Parka and L.L. Bean Primaloft Packaway are examples.
Climashield
Climashield produces continuous fiber insulations made of long and hollow fibers.
Filaments in their structure allow recovery after applying forces during stretching or washing. So, they might help maintain the insulation performance of your jacket for a long time.
The company has a wide variety of insulations like Climashield Apex, Contur, Prism…
Each insulation has a prominent characteristic. For example, Climashield Apex is touted as lightweight warmth. And Climashield Prism is a high-performance insulation material produced using AquaBan technology. So, it can repel water effectively.
Speaking of which, Arc'teryx ThermaTek is thought to be a rebrand of Climashield Prism.

Climashield PRISM Arc’teryx Cold WX Hoody LT Gen 2 Men’s - Women’s
Coreloft
Coreloft is synthetic insulation used exclusively by Arc'teryx. There are two kinds of this insulation: Coreloft Compact and Coreloft Continuous.
The Coreloft Compact is thought to be a rebrand of Thermore Classic. And the Coreloft Continuous is of Climashield APEX.
The Coreloft Compact is made of staple fibers in various sizes that are crimped to trap air for more warmth. It's compressible and soft but might lose loft faster because of short fibers.
As you might guess from its name, the Coreloft Continuous includes filament fibers in the structure. That’s why it features higher integrity and more durability. But you can compress it less. Also, I'd say this insulation has some limits on its weight.
You can compare Arc’teryx synthetic insulated jackets using its comparison page.
FullRange & PlumaFill
Exclusive to Patagonia, FullRange is a product of Toray Mills, Japan. This is why it’s believed to be a rebrand of Toray 3DeFX+.
FullRange, which is quite stretchy and breathable, includes multi-denier polyester fibers. For now, Patagonia uses this insulator only in Nano-Air products.
PlumaFill is another innovative synthetic insulation of Patagonia. Microfilaments in this insulator spiral a central fiber to mimic down very well. It’s pretty warm and compressible. You might want to check out this page for more info.
Conclusion
Your synthetic insulated jacket's warmth is mainly related to its insulation's CLO value. And the higher the value is, the warmer you feel.
But, companies infrequently share their products' CLO values. And finding them is a bit challenging and time-consuming.
So, I prepared a table with publicly available CLO values of synthetic insulators. And I added the calculated CLOs for synthetic jackets to the table. Also, you can find some details in the post about the common synthetic insulations in the market, like Primaloft, Climashield, etc.
I hope this information will help you when choosing a synthetic insulated jacket.
I recommend you also check out my other post, "Best Synthetic Insulated Jackets".