Assos Uma GT Ultraz Winter Jacket Evo

The Assos Uma GT Ultraz Winter Jacket Evo is a women's-specific cycling jacket built to handle serious cold-weather training without compromise. It sits at the top of Assos's Uma GT line — the GT designation signals performance-focused construction, while the Ultraz rating places it firmly in deep-winter territory. If you're committed to riding through the coldest months of the year, this jacket is engineered to keep that commitment viable.

Assos uses a combination of fabrics across the jacket, each placed where its properties matter most. The wind-facing front panels use NEOS Ultra + RX textile — a three-layer construction that is windproof, highly insulated, and breathable — designed to shield your core against direct headwind on long rides. The sleeves and shoulder areas use a two-layer membrane that prioritizes breathability and flexibility, keeping your upper body dry through sustained effort without the stiffness that heavier winter fabrics can introduce. NEOS Light at the tops of the arms and shoulders adds a degree of protection with a brushed interior treatment, managing heat where ventilation matters more than maximum insulation. The result is a jacket with differentiated zoning, each panel doing a specific job rather than one material attempting to do everything.

Assos Uma GT Ultraz Winter Jacket Evo — Specs at a Glance

• Women's-specific cut and construction
• NEOS Ultra + RX fabric on wind-facing front panels — three-layer, windproof, insulated, breathable
• Two-layer membrane on sleeves for breathability and moisture management
• NEOS Light textile on tops of arms and shoulders for added flexibility
• Full-length front zipper with locking mechanism for temperature control on the move
• Triple Ramp rear pockets for secure on-bike storage
• Available in Black Series and Fluo Yellow colorways
• Sizes XS through XLG in Black Series; XS through M in Fluo Yellow

Design Benefits

1. Zoned fabric construction: Rather than a single textile throughout, the Uma GT Ultraz uses purpose-matched fabrics across the jacket. Heavier insulation sits where wind exposure is greatest; more flexible, breathable material covers high-movement areas — so you're not fighting the jacket through your pedal stroke or overheating on a hard climb.
2. Practical storage and on-the-go temperature management: The three rear pockets hold enough for a full training ride, and the full-length zipper locks at any position — meaning you can crack the front for ventilation mid-effort without it creeping open or needing adjustment every few minutes.
3. Visibility option for low-light conditions: The Fluo Yellow colorway is designed with winter riding hours in mind — shorter days and reduced light are a reality of cold-weather training, and a high-visibility color adds a meaningful layer of safety without requiring a separate vest or accessory.