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Whether you are braving the cold as you contemplate a drop from a cornice or are just trying to get through a northern winter, the Caldera Hooded Insulated Jacket uses warmth-trapping Thermal R Eco insulation to preserve your body heat. Wear it under a shell or on its own; either way, you're doing a small part for the planet by opting for materials made from recycled plastic.

  • Nylon ripstop is durable, lightweight, and is great for layering
  • DWR treatment helps the shell fabric shed moisture to keep you dry during snow flurries
  • Thermal R Eco insulation offers excellent protection from the cold, and it's easier on the planet
  • Regular fit and Angel-Wing Movement allows your arms full range of motion
  • Internal mesh storage pocket holds and energy bar for quick refueling
  • Hood with peripheral cord adjustments let you seal out the wind without blocking your view
  • Hook-and-loop cuffs and elastic drawcord hem keep out cold air and snow
  • Reviews
  • Q & A

What do you think about this product?

Have questions about this product?

Love It!! But Too Big

  • Familiarity:I returned this product before using it

It does not claim to be slim fit but I expected it to be smaller. I am 6'1.5" and 180lbs. I have narrow shoulders and I went for the XL. My Stoic down Sweater/Jacket is XL and fits great. This Marmot fits bigger, so if you are my size get a Large (if they have it). I still think it is worth the money even with what I have. I will be using mine every morning as it is butt could driving to work and I will wear it under my shell riding snowbird, and I think it will work great for camping when it gets cold at night.

Hood is big, can probably fit helmet.

Mesh pocket inside is BIG.

Wore it at my desk at work and felt like I was on fire (it's warm)

Sleeves are plenty long!!!

Edit. After a day I decided to return it for a smaller size (large)

This link is me with the XL on.

Great Jacket, yet to be put to the test

  • Familiarity:I've used it several times

So far, I love this jacket; great fit and movement, adjustable, quite warm, and stylish (you might get some compliments). I took it on a hike going into the alpine zone, so it was pretty exposed, and it held up great to the wind and temp. I also use it for everyday wear and biking around the city with no complaints. However, I say yet to be tested since it has not gotten very cold yet, so I'll revise once the temp drops some more.

What is the approximate equivalent insulating...

What is the approximate equivalent insulating factor when compared to a similar down garment? i.e. 600fill, 800...

Best Answer

Taken directly from : "According to the Marmot rep I've talked to, the clo/oz. value for Thermal R Eco is around .8! This makes it almost as good as Primaloft One, directly comparable to Primaloft Sport, and 4X better than Primaloft's recycled insulation. The kicker is that while Primaloft Eco is 50% recycled, and still isn't very good, Thermal R Eco is 100% recycled. --- *clo is a unit of measurement pertaining to thermal retention. One clo is enough to keep a resting person comfortable at room temperature. clo/oz. is an important measurement for outdoors clothing, because while many things can keep you warm, very few of them can do it while being lightweight."

Continuing, this article ( states that Primaloft One is usually accepted "as the equivalent of down in the 500 to 550 range. (others say more like 450)" Thus, given that the first article claims the clo/oz ratio of the Thermal R Eco synthetic insulation is nearly as efficacious at insulating as Primaloft One, you could expect the jacket to be able to handle you to relatively cold temperatures (possibly, with a layer underneath, around 0 to -5 degrees Centigrade (~32 to 25 degrees Fahrenheit) though I feel that might be slightly pushing it), but below that, you may start to chill, especially if not moving for longer periods of time.

In any case, a short and sweet answer would be the equivalent of anywhere from 450- to 500-fill duck down.

There is not a simple answer to this question, as any comparison depends on how much and what kind of down is used, and what the weight per square yard of the synthetic insulation is used, as well as the brand and type of sythetic fill that is used . Simply, there are infinite variables when comparing.

As far as Marmot in particular goes, if you email or call their design department, they would be best sutited to answer your questions , but even then they would only tell you what jacket may be comparable relative to another jacket.

Myself, having worn both down and Primaloft jackets for many years , they are both great and each have pros and cons. It's like Apples and Oranges, alike and yet different.