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Assos sJ.blitzFeder Jacket - Men's

Sale $137.40 - $229.00

Item # AAS004Q Past Season Colors

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  • White Panther, XS ($137.40)
  • White Panther, S ($137.40)
  • White Panther, M ($137.40)
  • White Panther, L ($137.40)
  • White Panther, XLG ($137.40)
  • White Panther, TIR ($137.40)
  • Black Series, S ($229.00)
  • Black Series, M ($229.00)
  • Black Series, L ($229.00)
  • Black Series, XL ($229.00)
  • Black Series, XLG ($229.00)
  • Black Series, TIR ($229.00)
  • Safety Yellow, S ($229.00)
  • Safety Yellow, M ($229.00)
  • Safety Yellow, L ($229.00)
  • Safety Yellow, XL ($229.00)
  • Safety Yellow, XLG ($229.00)
  • Safety Yellow, TIR ($229.00)
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Item # AAS004Q

Fashionable foul-weather force field.

A primary issue that so many riders have with light, weatherproof riding shells is that they develop a clammy, humid feeling once you start sweating, as many of them are poorly ventilated. Not so with the Assos sJ.blitzFeder Men's Jacket.

The world-renowned fabric fanatics at Assos developed the blitzFeder's Foil043 fabric to combat this precise complaint. It's feathery light, at a claimed 96g for a size Medium shell. It's ultra-thin, too — ball it up into the integrated stuff sack and it easily fits in a jersey pocket. Assos calls the material a "natural windbreaker," which is its way of saying that there's no membrane applied in creating the windproof qualities of the material; the structure of the threads and the density of the weave make it so. A treatment is added to give the fabric water repellency. The fabric also pulls off the incredible trick of being resistant to flapping in the wind. If we could explain how it does this — or if the designers would share this closely-guarded information with the public so that we could — we would.

As with most Assos apparel, it's designed for a snug fit, and it fits best when in the riding position. There is elastic at the wrists and waist to keep things in place, and there are elastic mesh inserts on the sides of the back and under the arms to allow some stretch. Finally, there are reflective tabs on the shoulders and on either side of the waist.

The Assos sJ.blitzFeder Men's Jacket is available in a translucent color called White Panther. Sizes run from X-Small to the largest called TIR.

Tech Specs

95% nylon, 5% elastane
Recommended Use:
Manufacturer Warranty:

Size chart


Men's Apparel
Leg & Knee Warmers 0 I II
Height 4ft 11in - 5ft 2in
(150 - 159cm)
5ft 3in - 5ft 6in
(160 - 169cm)
5ft 7in - 5ft 10in
(170 - 179cm)
5ft 11in - 6ft 1in
(180 - 185cm)
6ft 1in - 6ft 3in
(186 - 190cm)
6ft 3in - 6ft 5in+
(191 - 195cm+)
XLG but wider
Arm Warmers 0 I II
Chest 35.4in
46.5+ in
How to Measure:
For best results, take measurements over your underwear.
Measure around the widest part of your chest.

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Assos, total pro

  • Familiarity: I've put it through the wringer
  • Fit: Runs small
  • Size Bought: xl

There's a reason it is more pricey than just about anything else out there. Their stuff just straight up works! Pro level gear, buy it nice or buy it twice.
The article of clothing to have when it's raining and you are in a race situation and there is no such thing as a team car to stash your gear or get the needed hand up. Lightweight and easy to put in your pocket. Runs a bit on the small size, I went with an XL for room for additional layers and when my pockets are stuffed for the 6 hour adventure.

NOT really water "repellent"

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: Small

Good for wind for sure, but not really even water "repellent" as described above. I wore this three times now in very light sprinkle (not even rain), and the water soaks through immediately. My Sportful jersey underneath was soaked within 5 minutes. I had a similar jacket by Endura that took about an hour before the water began to soak in. This one is a disappointment for what I expected... I'll wear it for cold winds, but definitely not for rainy days. Fit is perfect: I am 5'8", 148lbs and 37" chest, 29" waist and size small fits like a glove.

Update: wore it today 36mile ride, no rain, 40 degrees. I didn't sweat much at all, but the moisture from my body condensed inside the jacket and my jersey was soaked after just one hour.... not really breathing that well, apparently.

blitzfeder jacket

  • Familiarity: I've used it several times
  • Fit: Runs small
  • Size Bought: xl

great jacket for AZ winters. light enough to compact into a small ball, but great protection against the wind without the normal jacket flapping. also good arm length for tall guys with long arms (36").

This thing works!

  • Familiarity: I've put it through the wringer
  • Fit: Runs small
  • Size Bought: large

This jacket looks quite underwhelming when you first take it out of the box( incredibly thin, almost fragile). But it is tough,REALLY is packable in your jersey, and blocks wind.
Fit is tight (as in, when you stand straight up it is very restrictive across the chest), but on the bike the fit is perfect with no flapping. Zippers are super high quality and re-enforced.