* Product image may vary. Refer to the description for accurate details.

Assos Mille GT Wind Jacket S11 Info

The Assos Mille GT Wind Jacket S11 is part of the Endurance series, built for the 53–70°F range where wind is the primary challenge. It's the jacket that lives in your jersey pocket as insurance — light enough to carry on uncertain mornings, protective enough to matter when the headwind picks up.

Two fabrics divide the workload. The Buster textile covers the front panels, back, and outward-facing sleeves: a close-knit woven material rated 5/5 for windproofing with an Eco DWR finish that sheds light moisture without the environmental cost of conventional treatments. Sens Air panels on the body sides and inner sleeves are elastic and breathable — rated 3/5 for breathability — enough to vent heat during sustained effort so you're not unzipping within the first ten minutes.

The double slide zipper runs two sliders independently: crack it from the bottom to vent while the top stays sealed, or open just enough to reach into a jersey pocket underneath without fully removing the jacket. The main shell is 100% polyamide; the Sens Air stretch sections blend 75% polyamide with 25% elastane for full arm and torso mobility. Regular fit sits close enough to layer cleanly over a jersey while keeping seams away from pressure points.

The S11 is measurably more packable than its predecessor. It compresses into a jersey pocket without forcing it — which changes how you carry it. This becomes something you bring as a matter of course rather than leave behind because you're not sure the weather will turn.

Specs at a Glance

Series: Endurance
Temperature range: 53.6–69.8°F (12–21°C)
Fit: Regular
Shell fabric: 100% polyamide (Buster — windproof, water-repellent)
Stretch panels: 75% polyamide / 25% elastane (Sens Air — breathable)
DWR: Eco-friendly water-repellent treatment
Zipper: Double slide — two-slider for venting and jersey pocket access
Windproofness: 5/5 | Breathability: 3/5 | Waterproofness: 1/5
Packability: Compresses into a jersey pocket
Sizes: XS–3XL
Color at RA Cycles: Black Series

Design Benefits

Targeted wind protection — Buster textile on the front and outward-facing surfaces blocks wind where it matters most without covering the full jacket in a heavier shell.
Breathable stretch zones — Sens Air panels at the sides and inner sleeves move heat out during effort, preventing the overheating that makes riders unzip and regret it ten minutes later.
Double slide zipper — Independent two-slider design lets you vent, access pockets, or adjust coverage without fully unzipping in cold conditions.
Improved packability — Compresses smaller than previous generations, making it a realistic jersey-pocket carry on mixed-weather days.

Final Take

The Mille GT Wind Jacket S11 is a precision tool for a specific type of riding day — not a cold-weather insulator, not a rain jacket, but the piece that handles wind chill and edge-of-season conditions better than almost anything at this weight. If your rides regularly include early mornings, exposed roads, or spring and fall variability, this is a jacket that earns consistent use.

The RA Perspective

We've found the Mille GT Wind Jacket to be one of those pieces riders overlook until they actually try it — then it becomes the first thing they reach for when the morning forecast shows 55°F and a headwind. The premise is simple: full wind protection where you face the elements, breathability where you don't. In practice, that means you can push a steady effort on an exposed road without overheating in the first twenty minutes.

The double slide zipper is more useful than it sounds. Being able to vent from the bottom without opening the top is the kind of detail you only appreciate when your hands are cold and you'd rather not fuss with a full zip. The pocket access is equally practical — you're not wrestling the jacket off at every feed stop.

The packability improvement in the S11 is real. Earlier versions were fine but a bit bulky when rolled; this one fits into a jersey pocket without much convincing. That changes how you think about bringing it — it goes in as insurance rather than staying home because you're not sure you'll need it.

At $185, it sits in the middle of what Assos charges for outerwear, and it earns its place. If your riding overlaps with early spring or late fall in variable conditions — or early mornings that warm up by noon — this is a jacket that earns consistent use across the season.