Assos Mille GT Ultraz Winter Jacket Evo review

The fit and function of this winter jacket is spot on, the only possible criticisms are the lack of a zipped pocket and the price

Assos Mille GT Ultraz Winter Jacket Evo
(Image credit: Stefan Abram)
Cycling Weekly Verdict

This is a top-quality winter jacket, offering a great fit, whilst being super warm but still very breathable. It also has some more unique qualities, such as the brilliant double sleeve design which works very well with gloves. It is, however, very expensive, which could make its purchase hard to justify against the competition.

Reasons to buy
  • +

    Very warm,

  • +

    Great fit,

  • +

    Clever double sleeve design

Reasons to avoid
  • -

    The price

  • -

    No zipped pocket

You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

Tucked away in the mountains of Switzerland, Assos know a thing or two about demanding conditions and the necessary clothing. Intended to be the “ultimate solution for the harshest winter conditions”, this jacket is the big brother to the Assos Mille GT winter jacket we’ve been previously impressed by.

If you're wondering what else we've been impressed by when it comes to the best winter cycling jackets  then it's worth heading over to the buyer's guide for all our handpicked favourites. 

In fact the same goes for the rest of winter cycling clothing and knowing what to wear and when is always worth a re-visit. 


The outer and inner layers of this jacket are distinct fabrics which have some degree of movement independent of each other. This, together with the impressive stretchiness, is a major contributing factor to the excellent fit. In no places does it feel baggy or restrictively tight.

Perhaps the best consequence of the two layer construction is that you are no longer faced with the age-old conundrum: Do the cuffs of your gloves go over your sleeves or do your sleeves go over the cuffs of your gloves? With this jacket, you can put the cuffs over the inner fabric, preventing drafts shooting up your arms, but have the outer fabric go over the top, stopping any rain from dripping down into your gloves.

But beyond just being cleverly paired, the fabrics are outstanding in their own right. The RX inner is luxuriously soft to the touch and provides instant warmth. On the outside, various NEOS fabrics are used dependant on the location, with hardier materials employed in the more exposed locations such as on the arms.

The breathability is outstanding, rated at 27,000 g/m2/24H, while the waterproofing is more than capable of fending off showers, being rated to a water column of at least 10,000mm. Although, for a heavy and sustained downpour, you would be better off going for a dedicated hard-shell.

The three rear pockets are generously sized with flaps at the top functioning as “lids” and intended to keep the contents of your pockets safe and secure. With regards to reflective detailing, there are two strips that run the height of the rear pockets.

Assos Mille GT Ultraz Winter Jacket Evo

The Ride

Such is the warmth of this jacket I felt no need for a even one of the best base layers—even when riding at a relaxed pace in temperatures bordering on sub-zero. On longer rides, the jacket remained comfortable with no seams causing niggles and it never felt restrictive in any way.

Putting in some harder efforts, I was boardering on overheating. Fortunately, the zip is easy to operate—even with cumbersome winter gloves—and the ensuing flood of cold air kept me comfortable.

The flaps on the rear pockets did allay any worries of my phone auto-ejecting on rough terrain, but, as a consequence, it did make extracting the phone rather more difficult. Although I had more confidence in my keys staying put than with ordinary pockets, the inclusion of a zipped pocket would have provided me with greater peace of mind.


Although the Mille GT Ultraz Winter Jacket Evo is unquestionably expensive, this level of price tag isn’t unprecedented, with Castelli’s Double Espresso winter jacket also retailing for £290. However, there are more affordable jackets out there which offer comparable performance, such as Santini’s Vega Extreme (£239) and Sportful’s Fiandre Cabrio (£210), both of which were awarded 9/10 in their reviews.

In Assos' defence, it's kit is renowned for lasting for years - so purchasing a solid winter item from the range is generally considered a good investment, even if the initial outlay is a big one.

View deal at Wiggle for £290

View deal at Wiggle US for $337.50

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