The basic issue, for me, is the jacket’s active exertion comfort range, by itself, occurs at colder temperatures than I normally encounter. On many occasions, especially sunny, calm, cool (25-35F) conditions, the jacket simply got too hot so I had to take it off.
By Will Rietveld
The concept started with the introduction of Polartec Alpha
– breathable insulation claimed to maintain warmth and comfort while actively
exercising. Soon after the introduction many manufacturers offered breathable
insulated jackets. Although Patagonia uses their proprietary FullRange
Insulation rather than Polartec Alpha in the Nano-Air Jacket, the functionality
is basically the same, and Patagonia does a
great job with the implementation.
Patagonia men’s Nano-Air Jacket in “Underwater Blue”. |
The Nano-Air, and other jackets of this type, are claimed to
be a jacket that you never have to repeatedly put on and take off to stay comfortable
in varying conditions, and one that permits the user to stay comfortable no
matter what level of activity. That’s a “lofty” claim, so I decided to try one
out to see how it actually performs. Actually, if the claims are even somewhat
real, that would be a good improvement.
Specifications and Features
Manufacturer
|
|
Model
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Men’s Nano-Air Jacket
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Shell and Lining
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Shell is 1.3 oz/sq yd 20-denier nylon ripstop with DWR,
lining is 2 oz/sq yd 50-denier plain weave nylon with DWR; both have 2-way
stretch
|
Insulation
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60-gram FullRange polyester, 40 CFM
|
Weight
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Measured weight men’s Large 13.2 oz; mfr specification
12.5 oz for size Medium
|
Features
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Full-height front zipper with storm flap behind, 2
zippered handwarmer pockets, 1 zippered chest pocket, elastic cuffs, hem
drawcord with 2 adjustors
|
Fit
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Athletic fit with set-in sleeves, “unlimited range of
motion”
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MSRP
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$249
|
Description
Front View. The Nano-Air has an athletic fit, meaning close to body. The sleeves are extra long and trim, and the body extends below the waist. The full-height zipper is not the water-resistant type. |
Back View: The jacket is sized so it can be worn over a heavier baselayer or fleece pullover. |
Hand Pockets. Two “handwarmer” pockets are actually lined with the shell and lining fabrics. Both are very soft so they feel warm. The pockets are large enough to store gloves. |
Underarm. Brick quilting in the side panels, plus articulated patterning and other quilting details improve the jacket’s shape and durability. |
Testing
I tested the Patagonia Nano-Air Jacket on a total of 11 trips that included backcountry skiing, snowshoeing, cross-country skiing, snow walking, and two multi-day ski-in trips to a mountain cabin. |
Here are my fit/feel/ergonomic observations from testing:
- The jacket is incredibly soft and supple, and has a stretchy feel.
- The fit is excellent and true to size.
- The back covers my butt.
- There is room inside for some layering if desired.
- The fit around my neck is loose (see the first photo under Description).
- It has wonderful articulation and is very comfortable to wear.
- The hand pockets are located high, above a backpack hipbelt.
- Love the longer sleeves.
Both the shell and lining have a good DWR treatment, which causes water to bead up and roll off, and prevent snow from sticking. |
My observations on temperature regulation and comfort in high-exertion activities are a mixed bag:
- For me, the jacket performed best over a thin baselayer to get maximum benefit from its breathability.
- Adjusting ventilation by opening/closing the front zipper, or tightening/loosening the hem drawcord are more effective for temperature regulation than jacket breathable insulation and fabrics.
- The aforementioned combination of ventilation and breathability factors are sufficiently effective during active exertion only in cold or very cool conditions, specifically below 25F, overcast, and breezy/windy. Some combination of those factors is required for comfort, otherwise the jacket is too hot to wear comfortably.
- On several cold days (below 15F) the jacket performed wonderfully with the front zipper closed.
- However, on many occasions (not cool, overcast, or breezy enough), the jacket simply got too hot, even with the front zipper open, and I had to take it off.
- As claimed, donning a shell over the jacket in really cold/windy conditions adds a lot of warmth.
- When I stop to rest, the jacket dries out quickly, and I get chilly if I don’t donn a shell over it.
Assessment
The basic issue, for me, is the jacket’s active exertion
comfort range, by itself, occurs at colder temperatures than I normally
encounter. On many occasions, especially sunny, calm, cool (25-35F) conditions,
the jacket simply got too hot so I had to take it off.
I do agree that the jacket’s fabrics and insulation help to
extend the comfort period, but a larger amount of temperature regulation is accomplished
by simply opening or closing the front zipper. I
find the same to be true when I test waterproof/breathable rain shells –
fabric breathability helps, but ventilation is the main contributor to comfort.
It appears, for me, that a lighter weight breathable jacket
is needed, such as the Patagonia Nano-Air Light Hybrid Jacket, to accomplish the
“keep it on” goal for high exertion sports in cool and cold weather. I can
always don a shell over the lighter insulation layer if I get too chilly.
For light or moderate exertion in cool temperatures, like a
walking pace on flatter ground, the Nano-Air performs well; it’s a matter of consistent
weather conditions and activity level. However, how often does that happen? If
the sun comes out, or a hill comes up, or the wind stops, its time to open the
front zipper to regulate temperature, the same as any other jacket.
The bottom line from my testing is the Nano-Air Jacket effectively
regulates temperature in cold weather active endeavors, but its too much
insulation (for me) to wear continuously in active cool weather sports.
The latter is more common in my situation, so the Nano-Air Jacket is too much
insulation if the goal is to “keep it on”. I believe a more functional and
versatile option would be to go with a lighter breathable insulation garment,
like the new Patagonia Nano-Air Light Hybrid Jacket and don a highly breathable
shell over it (such as the new Patagonia Airshed Pullover), as needed to
maintain comfort. A combination of those layers, plus the huge ventilation
benefits from simply adjusting the zipper(s) should perform well.