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AssosMille GT Ultraz EVO Winter Jacket - Men's


Item # AASZ01G

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  • blackSeries, L ($369.00)
  • blackSeries, M ($369.00)
  • blackSeries, S ($369.00)
  • blackSeries, XL ($369.00)
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  • lollyRed, M ($369.00)
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  • lollyRed, TIR ($369.00)
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  • visibilityGreen, L ($369.00)
  • visibilityGreen, M ($369.00)
  • visibilityGreen, S ($369.00)
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Item # AASZ01G

Mille GT Ultraz EVO Winter Jacket

Winter training on the open roads is not just a test of your resolve, but it’s also the season to experience cycling on deserted roads and climbs whose chilled pavement and snow-lined shoulders turn away the more fragile cyclist. Assos’ Mille GT Ultraz EVO Winter Jacket insulates your core on rides such as these and protects your motivations against harsh winter climates as you churn out the base miles. Updated to add increased protection and warmth throughout the entire jacket, Assos starts with the front and upper back — which face winter head-on — and combines their triple-layered NEOS Light and RX Heavy fabrics for windproofing and water-repellency. The sleeves are fortified with the breathable yet still winter-ready, two-layer NEOS Ultra and 652.RX fabric, while the back panel uses a three-layer, winter-proof and breathable soft-shell, NEOS Medium. Assos looks at the entire system as combining the highest performing materials to meet the required goals of keeping you warm and protected as you train.

Assos uses targeted stitch patterns to ensure a full range of motion in the riding positions, while the center-weighted pockets are held tight and stabilized for comfort. The Tripe Ramp pockets themselves create “lids” over your cargo to add security and peace of mind, as you don’t want to be losing your phone in deep-winter training. The full-length zip helps manage overall heat buildup, and the regular fit of the Mille GT Ultraz accommodates your favorite baselayers without adding bulk that would catch in the winds.

  • Mid-winter cycling jacket for dedicated cyclists
  • Blend of elite, winter-ready materials holds warmth and protects
  • Breathable, windproof, and water resistant NEOS fabrics
  • Regular fit for adding extra layers of comfort
  • Reflective accents on sides and center-pocket

Tech Specs
Material[front/upper back] NEOS Light, RX Heavy, [sleeves] NEOS Ultra, 652.RX, [back panel] Neos Medium
Waterproof RatingNEOS Medium (>10,000mm)
Breathability RatingNEOS Medium (14,600g/m2/24h)
Windproof Rating100%
Lengthwaist, drop tail
Pockets3 covered rear
Recommended Usecommuting, gravel, mud/sand/snow, road cycling
Manufacturer Warrantylimited


Men's Apparel
Leg, Knee, Arm Warmers0III 

5ft 3in - 5ft 7in

(160 - 170cm)

5ft 7in - 5ft 9in

(168 - 175cm)

5ft 8in - 5ft 11in

(170 - 179cm)

5ft 11in - 6ft 2in

(180 - 187cm)

6ft 1in - 6ft 2in

(185 - 189cm)

6ft 3in+



< 132lb

(< 60kg)

< 154lb

(< 70kg)

< 165lb

(< 75kg)

< 176lb

(< 80kg)

< 187lb

(< 85kg)

< 198lb

(< 90lb)

> 198lb

(> 90lb)


27.5 - 29.1in

(70 - 74cm)

29.2 - 31.5in

(75 - 80cm)

31.6 - 33.8in

(81 - 86cm)

33.8 - 36.2in

(87 - 92cm)

36.3 - 38.9in

(93 - 99cm)

39 - 41.7in

(100 - 106cm)


















Note: Assos clothing has a very slimming, anatomic cut, if your build is less than slim or if you like your fit looser, go up in size.

How to Measure:
For best results, take measurements over your underwear.
Measure around the widest part of your chest.
Bend to the side and measure around the place where your waist bends, keeping the tape a bit loose.

What do you think about this product?


>Rating: 5

Proper Winter Jacket

I've used it once or twice and have initial impressions
True to size
Size Bought
5` 10"
190 lbs

Wow, finally a jacket that is comfortable, wind-proof and warm from 45 F down. My main issue with my other winter jackets was the wind protection, especially in the arm sections. I took this bad boy out the other day with the temp starting at around 36 F and ended around 45 F. Wind was between 12-16 MPH. I wore an Assos, long sleeved, winter skinfoil 4.4 base layer under the jacket. First 15-20 minutes of the ride, I was questioning my purchase. After an hour on the bike, I was noticing that I was comfortable and not thinking about the weather. 2 hours into my ride I was not thinking about the jacket at all (it was doing its job). Especially when I was riding straight into a head wind of 16 MPH for numerous miles. I could not feel the wind through this jacket!!!! After my three hours in the cold was up, I was contemplating buying a second jacket in the lollyRed (just joking!). This is an outstanding jacket. Once you get over the $369 price tag, everything else is great. In this instance, you get what you pay for. If you are looking for a winter jacket that will battle the cold and wind, look no further. The jacket actually does everything it claims to. I am a 51 year old, 5'10", 190 lb. weekend warrior rider. I only ride 2 times a week. Each ride is between 50-60 miles. I am in great shape, but would definitely be considered a "bigger" rider in the peloton. I usually wear an XL in all of my Assos Kit. I did go up to the XLG because I felt the XL was just a "smidge" too tight. After I wore the jacket on my first ride, I probably would have been OK with the XL, but I like the "roomier" fit of the XLG for my winter rides. I can not wait to see what the limits (cold temp) of this jacket will be. I feel that with my winter Assos skinfoil 4.4 base layer, I should be fine down to low to mid 20's F.


i just ordered and received a large Mille GT jacket ULTRAZ winter men's large. I am not large at all (5'9"/170), but the jacket is way too tight in the arms and shoulders. I usually wear medium to large regular shirts/etc, but this is not close. I'm not even sure an XL would be comfortable. Would like to know what to do.

Hey Peter, thank you for reaching out. Some of the Castelli Pieces fit a little tighter due to the materials used, as well as the intended fit. We do see riders sizing up, but before you do, I would encourage you to try the piece on in the riding position. When standing straight up, the cycling fit usually creates added tightness in the shoulder area, to allow for better comfort when actually riding! You can always try the next size up to see if that makes for a better fit, and know in doing so, that you are not the only one!