UMA GT Wind Vest S11

Assos UMA GT Wind Vest S11

The Assos UMA GT Wind Vest S11 is your lightweight companion for those breezy spring and autumn days in Switzerland, or when light drizzle starts to set in. The new Buster main fabric now covers both the front and back, replacing the earlier mesh panel — giving you consistent protection against wind and light moisture, while still packing down tiny enough to fit in your jersey pocket. Thanks to the Double Slide Zipper, you can open the two-way zip from the top or bottom, fine-tune your ventilation, and easily reach the jersey pockets underneath. The regularFit lets you layer the vest effortlessly over your jersey and base layer without any bulk — ideal for unpredictable rides across the Mittelland, Jura, and Alps. The recommended temperature range of +12 to >+21 °C shows just how versatile this vest is during Switzerland's typical transitional seasons.

• Buster main fabric front and back: windproof and water-repellent, packs down small
• Stretchy, breathable Sens Air side panels for freedom of movement
• Double Slide Zipper: two-way zip for ventilation and pocket access
• regularFit: close-fitting, comfortable, perfect for layering
• Eco DWR treatment for protection against light rain and spray
• Performance ratings: Wind protection 5/5, Breathability 3/5, Insulation 1/5
• Available colours depending on season: Black Series, Almond Milk, Edge Green, Golden Yellow

Technical Details and Features

The tightly woven Buster fabric is engineered to reliably block wind and, thanks to its water-repellent treatment, bead off light rain and spray without compromising packability. The sides feature Sens Air, delivering extra stretch and breathability exactly where you need it most. The Double Slide Zipper gives you flexible climate control while also making it easy to access the jersey pockets underneath. With the regularFit, a contoured cut reduces the number of seams, minimising potential pressure points on longer rides. The stated performance ratings (Wind protection 5/5, Breathability 3/5, Insulation 1/5) highlight the focus on protection without overheating. The materials are clearly specified: main fabric 100% polyamide; side and neck panels 75% polyamide / 25% elastane, combined with an Eco DWR treatment.

Use Cases and Benefits

Whether you're commuting along Lake Zurich, riding into a Northerly foehn in Ticino, or descending a long alpine pass — the UMA GT Wind Vest S11 keeps your core comfortably protected when the wind picks up. It shines as a quick extra layer over a short- or long-sleeve jersey, packs away to almost nothing when the sun comes out, and can be adjusted to match your effort level in seconds thanks to the two-way zip. The full Buster coverage across the back really pays off in gusty conditions and on wet roads, while the Sens Air panels ensure you can move freely and breathe easily. Keep in mind that the vest is intentionally low on insulation and is not waterproof — that's exactly the point for in-between days and as emergency protection, not as a rain jacket for heavy downpours. The colour range includes Black Series, Almond Milk, Edge Green, and Golden Yellow, so you can match the vest to the rest of your kit.

A note on the bigger picture: the S11 generation of the UMA/MILLE GT line deliberately focuses on improved breathability and refined construction to combine everyday usability with a noticeable performance boost — perfect for long training rides and versatile touring. This direction is reflected throughout the current S11 collection, with fine-tuned materials and fit details that emphasise comfort and stability across many rides. This positions the UMA GT Wind Vest S11 as a coherent layer within Assos's system-based approach to kit: lightweight, packable, efficient — exactly what you'll reach for most often between spring and autumn.