In the dry western US we carry our rainwear much more than we wear it,
thus our priority is finding the lightest functional rainwear available. The
Fuse Jacket meets these criteria quite well, so I give it high marks.
By Will Rietveld
The Fuse Jacket is marketed as a water-resistant and
breathable running jacket, but I used it as an ultralight rain jacket for
backpacking.
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The North Face Flight Series Fuse Jacket (TNF photo). |
Actually I didn’t know that it’s only water-resistant and
meant for running. I checked the North Face website and found some mixed information
about the jacket: on the one hand they describe DryVent as a
waterproof/breathable technology, but on the other hand they describe the
jacket as water- and wind-resistant.
So how waterproof is it, and how suitable is it for
backpacking?
Specifications and
Features
Manufacturer
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The North Face (www.thenorthface.com/)
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Product
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Flight Series Fuse Jacket
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Materials
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53 g/sq meter DryVent 2.5L (PU membrane on nylon)
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Features
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FuseForm fabric with engineered ventilation, 1 chest
pocket, water-resistant zippers, adjustable hem, elastic cuffs, attached hood
with brim and one rear adjustment and elastic on sides, seam taped, 360
degree reflective logos
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Weight
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Size Large tested, 5.35 oz, mfr specification size Medium
4 oz
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MSRP
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$250
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Description
The Fuse Jacket has FuseForm fabric construction, which is
described by TNF as: “Our proprietary fuseform construction technique … is a
revolutionary weaving process that blends thicker, more-durable threads with
lighter, lower-density fibers in high-wear zones, effectively reducing overall
weight and creating a seamless transition from tougher to lighter zones.” That
basically means that the fabric is both lightweight and durable.
The waterproof technology in this jacket is DryVent 2.5L,
which is described by TNF as: “DryVent™ fabrics using a 2.5 Layer construction
are primarily used for highly active, fast and light pursuits, where light
weight and packable is an essential requirement of the user. The inner layer is
finished with a functional dry touch print that helps raise the fabric from the
skin to provide comfort and enable the quick transfer of vapor through to the
outside of the fabric. These fabrics are generally designed into unlined
clothing and accessories for maximum light weight, packable, waterproof and breathable
performance.”
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A third technology in the Fuse Jacket is “engineered ventilation” consisting of fabric perforations in the underarms, side panels, and back. The perforations are cut in the thin nylon fabric before the membrane is laminated on, so the holes are covered by the thin membrane. |
Besides the technologies in the jackets, the features are
Spartan, as would be expected for an ultralight rain jacket: elastic cuffs and
hood side adjustment, one zippered chest pocket, one simple hem adjustor, and
one simple hood adjustment on the back. It does have a full-height front
zipper, which is very handy for thermoregulation.
Field Testing
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I tested the Fuse Jacket on 14 outings consisting of day hiking, backpacking, XC skiing, and snowshoeing. |
Fit – The Fuse
Jacket has a trim fit, meaning it fits close to body. The back and sleeves are
adequately long for a size Large (back is 29.5 inches, raglan style sleeves are
35 inches from center back neck). The jacket will layer over a thinner midlayer;
I was able to layer it over an ultralight down jacket.
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The hood has sufficient adjustability for a good fit. It has a stiffened brim, side elastic edging, and one adjustor on the back. |
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The sleeves measure 35 inches long (center back neck to cuff), but they were a smidgen short for me. |
Adjustability –
Although the jacket’s adjustments are minimal, I had no problem adjusting the
jacket’s hem and hood to seal in heat and seal out weather.
Breathability –
The jacket’s thinness and perforations do give it more breathability than the
average rain jacket made of heavier fabrics. It will steam up inside while
hiking uphill carrying a backpack, but the front zipper helps a lot to maintain
comfort. The breathability specification is 750-800 g/m²/24 hours. The silver
color of the tested jacket also reduced heat absorption, keeping the jacket
cooler.
Durability – In
my testing I carried a day pack or backpack over the jacket on most trips and
there are no signs of wear in the fabric, especially on the shoulders.
Waterproofness –
Despite the label “water-resistant running jacket”, the Fuse Jacket performed
just fine as a rain jacket for backpacking. I tested it in rain and snow and it
stayed dry inside.
Windproofness –
As expected, the jacket sheds wind with aplomb. It’s not as breathable and
comfortable in the wind as a dedicated wind jacket, but it comes close. Opening
the front zipper offers a lot of thermoregulation.
One issue I had with the Fuse Jacket is the stiff
water-resistant front zipper. It’s basically a two-handed operation to
open/close the zipper. Another issue is its trim fit, which limits layering.
However, the Fuse is intended for running, for which the trim fit is
appropriate.
Evaluation
For lightweight and ultralight backpacking we look for the
lightest rainwear that will provide rain protection when needed. In the dry
western US we carry our rainwear much more than we wear it, thus our priority is
finding the lightest functional rainwear available. The Fuse Jacket meets these
criteria quite well, so I give it high marks.
However, this jacket is expensive at $250.
I don’t mind the stiff front zipper, I can get used to that,
and what’s more important is that it works properly.
What I do mind is the trim fit. When I layer it over a
thin insulating jacket the Fuse is a snug fit. Going to the next larger size is
not a good option because that bumps the weight up. The limited layering
ability of the Fuse relegates it to summer-only use.