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The Assos Mille GT Jacket Spring Fall is a cracking choice for riding hard in the cooler seasons, where changeable weather is the norm. With beautifully engineered technical features, it doesn't put a foot wrong. Just be aware that it expects you to work, and keep working.
Assos of Switzerland has the tagline 'sponsor yourself'. It isn't afraid to price accordingly pro, and you pretty much get what you pay for. Anecdotally, the gear lasts and lasts – friends have Assos kit that's over a decade old, that's ridden hard year in, year out. But longevity wouldn't amount to a hill of beans if it weren't comfortable and functional to boot. Fortunately, in the Mille GT Spring Fall jacket, it's nailed both.
The Mille GT Spring Fall is classed as a jacket, not a jersey. At the front the triple-layer high-vis chest panel (other colours are available – with a blue panel and, for £170, black-fronted) is rated at 10,000mm of water head – i.e. waterproof, and it's windproof too.
Around the stomach, shoulders and front of the arms is a thermal brushed fabric, while across the back and under the arms a lighter, non-thermal fabric aids cooling and sweat loss. There's no DWR-treatment, mind – if it's going to rain for prolonged periods you'll be needing an actual waterproof.
Technical features abound. The full-length zip features a flap and garage at the top, the hem has a dual-stretch multi-angle design that keeps things snug when bent over, with the obligatory silicone grippers at the back, and there are reflective accents down each side.
The 1.5in cuffs are strongly elasticated to keep the long sleeves put under your gloves, and the pockets feature Assos' 'triple ramp' retention flaps.
These are a simple idea but work so well. You slide whatever – a pump, a tool roll, a phone – into the pocket, then the flap that's sewn into the jersey side goes over the top, preventing your stuff being ejected. Very simple.
Assos offers a three-month no-quibble return on any fault you may find, and a free one-year crash repair or replace policy. Just as well, because if you trash a £165 jacket on your first outing you're likely going to be more worried about your wallet than any injuries.
I reviewed the Mille GT Spring Fall in a Scottish autumn, with temperatures varying between 5 and 12 degrees, mixed wind and sun, and a bit of rain. Safe to say, 'Spring Fall' pretty much covered there. I run pretty cold, and need to keep my forearms toasty to ward off Reynaud's Syndrome in my hands when circulation shuts down no matter how thick the gloves. The Mille GT paired with a 100gsm merino long-sleeve layer did the job, so long as I kept working at 80% of max heart rate.
I could feel the fleece insulating my forearms and biceps at the same time moisture was evaporating from the rear of my arms and back. Over many hours I never felt cold, nor hot – rather, always aware my temperature was just right to push on fast. Certainly if I'd been bimbling along I'd have needed something warmer, but this appears to be Assos' market – people who want to go hard pretty much the whole ride. The totally windproof and waterproof front panel occasionally got zipped down a bit on longer climbs, but never felt sweaty, nor did the stomach area.
Pairing the Mille GT with a thin, pocketable windstop jacket over the top upped the insulation enough to comfortably ride in low single digit temperatures while maintaining breathability. Clearly overkill on the front waterproof panel, but for me keeping hands working through warm arms is critical.
I reviewed a size Medium, which was bang on for my 75kg/6ft tall/38in chest with long arms (and bang on with Assos' fit chart). The arm fit in particular was a very pleasant surprise; I'm used to cuts being an inch or two short which is definitely not what you want in a spring or autumn jacket, when you're likely to be layering long-cuffed gloves. (It's not me in the photos, by the way.)
The £150 Endura Pro SL Thermal Windproof is of a similar ilk, not a total waterproof but good for cooler days out with a bit of a sprinkle not posing a problem. Steve did note the short arms being an issue, mind, something Assos has sorted to ensure no gaps between gloves and sleeves.
Yes, it's a lot of cash for a mixed-up chameleon of a product like the Mille GT Spring Fall. It's too technical/pricey to replace a single-fabric jersey, and layering under a proper 100 per cent waterproof jacket seems overkill. And if it starts to pour or gets seriously cold you'll be soaked or freezing after a while. It's best regarded as Baby Bear's porridge for the written-on-the-tin non-torrential Spring Fall season days, offering protection where it counts from rain, spray and wind while you fang along at a rate of knots among the green shoots or the falling leaves.
Properly technical jacket for going fast in changeable conditions while remaining cool
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road.cc test report
Make and model: Assos Mille GT Jacket Spring/Fall
Size tested: Medium
Tell us what the jacket is for and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?
It's for going fast in cooler seasons, with a slim fit and technical features.
Assos says: "The cool, sometimes wet, and constantly shifting weather patterns of fall and spring inspired the textile blend for our versatile new MILLE GT Spring/Fall Jacket. We see it as a fine cross between a thermal LS jersey and a membrane-equipped shell''perfectly suitable for mild days in the saddle and essential when conditions take a turn for the wet and windy.
"Cut in our revised MILLE regularFit, the Spring/Fall Jacket is less compressive than our racingFit apparel, providing a clean silhouette when paired with a jersey or base layer. The upper front panel is constructed using our NEOS MILD, which is a 3L softshell with PU bonded membrane. Highly breathable, water-resistant, and 100% windproof, this flexible house-developed textile ensures your chest stays fully protected from rain, road spray, biting winds, and low temps. For a touch of insulation, we included our brushed bi-stretch RX material along the abdominal and tops of the arms, with Type.157 on the central back panel and underside of the arms for boosted breathability. In the back is our Triple Ramp Pocket system that locks in your cargo, the spring/fall (2/3) climaCode graphic on the upper panel, and a set of reflective strips on the lower left and right sides."
Tell us some more about the technical aspects of the jacket?
NEOS MILD: A patented 3L windproof and highly breathable softshell constructed with a PU bonded membrane for added water-repellency. Weight: 260g/m2; Breathability: MVP 20,000g/m2/24h; Water Column: >10,000mm; Elasticity: 4-way stretch.
RX: A brushed bi-stretch warp-knit fabric developed to wick moisture and add light insulation.
Type.157 Stripe Tex: Our proprietary breathable and stretchy circular knit textile with built-in UV protection and odorControl.
2W waistWave: Stitch construction on the waist preserves the natural stretch of the front panel's textile, absent of elastic material.
Triple Ramp Pockets: Flexible fabric panels sewn into each of the three pockets create "lids" for your cargo, covering the contents for added security and stability.
Full-Length Zipper: Temperature regulation courtesy of a lightweight full-length zipper with camlock.
Reflective Accents: Placed on the sides of the outer pockets for added visibility.
Abdominal Cut: Triangulated pattern on the abdominal area provides a smooth, comfortable wrap.
Raglan Cut: Sleeve design free of a traditional shoulder seam, continuing up to the neck for greater range of motion.
regularFit: Optimized for total comfort in the riding position, with a more relaxed cut than our second-skin racingFit.
Beautifully made – not a stitch out of place.
It lets you stay dry and comfy whilst going hard.
It still looks new, after a month of washing.
The chest panel does indeed appear to be totally waterproof – but kind of moot as it's surrounded by non-waterproof panels.
Yep, it breathes like nothing I've ever work before in this use case.
Love the fit – if you're broad of shoulder and long of arm, it's a cracker.
Spot on, to the mm.
At 250g, for the technical features, it's pretty darn light.
The cut of the panels come together to wrap you like a glove.
£165 is a lot of cash for a two-season non-waterproof, but if you want to be perfectly balanced in the shoulder seasons, this is the one to do it in.
How easy is the jacket to care for? How did it respond to being washed?
Still looks like new, in a common wool wash.
Tell us how the jacket performed overall when used for its designed purpose
Can't fault it. Perfect.
Tell us what you particularly liked about the jacket
The pockets are rather nifty, as are the lovely long sleeves.
Tell us what you particularly disliked about the jacket
Maybe more visibility from the back...
How does the price compare to that of similar products in the market including ones recently tested on road.cc?
The £150 Endura Pro SL Thermal Windproof is probably the closest fit – so at £165 Assos isn't far off the mark.
Did you enjoy using the jacket? Yes
Would you consider buying the jacket? Yes
Would you recommend the jacket to a friend? Yes
Use this box to explain your overall score
Yes, it's £165 for a garment you'll likely wear 4-5 months of the year tops. My rating of 4.5 stars – 'exceptional' – is based on the specific use case of clothing to go fast in, in the cooler seasons where changeable weather makes wind and rain a likelihood but not a certainty on a given ride. Yes, that's a niche use case, but it would be unfair to compare the Mille GT Spring Fall against a generic multi-season jersey or jacket. It's a specific hybrid of a product, for a specific use case. Considered in that regard, it is indeed exceptional at what it does.
About the tester
I usually ride: Merida Ride 5000 Disc My best bike is: Velocite Selene
I've been riding for: Over 20 years I ride: A few times a week I would class myself as: Expert
I regularly do the following types of riding: cyclo-cross, club rides, general fitness riding, mountain biking, Dutch bike pootling.