ASSOS UMA GTV Shell Jersey S11

NEW ASSOS Collection item Spring/Summer 2026
Available May 2026

The ASSOS UMA GTV Shell Jersey S11 is a versatile, stowable wind shell that layers over a jersey to provide more coverage than a traditional vest, engineered for early summer mornings or cool shoulder-season conditions.

SPECIFICATIONS
Temperature +12 / +20°C
Riding conditions Cool/Wind
Fit Regular
Breathability 4/5
Insulation 1/5
Windproof 3/5
Waterproof 1/5
ASSOS CLIMACODE 2.3 SPRING/FALL - color code yellow

In late spring, early fall, and even summer mornings, cool conditions can be a challenge. With the GTV Shell Jersey S11, your ride won’t be. Developed in collaboration with pro riders, ensuring it meets the specs of the world’s best. ASSOS new Phantom textile is deployed across the front, shoulders, and sides, situating a tightly woven, highly breathable shield between your body and chilly air. A double-slide zipper allows bottom-up ventilation and access to jersey pockets underneath, and a zip-secured pocket doubles as a self-stowing compartment. Think of the Shell Jersey S11 as the most advanced, most protective version of a wind gilet to date, but then realize that it provides additional protection courtesy of the one thing all actual vests lack ...sleeves.

Technology overview | The finer details
FEATURED FABRICS
The main textile is Phantom, a tightly woven textile with 4-way stretch that shields against wind. It’s also highly breathable and dries fast, maintaining a dry microclimate when cool conditions could turn internal moisture clammy and frigid. Sens Air Plus sleeves wrap your arms in close-fitting, breathable comfort and UPF 50+, and a vertical panel of K-Net on the back adds elasticity for a fit appropriate for racing.

CONSTRUCTION/FIT
A sleeker, more aerodynamic version of ASSOS streamlined regularFit, the GTV Shell Jersey S11 is engineered for training and even race day.

ENGINEERING
//Double Slide Zipper: A two-slider construction that allows easy access to jersey pockets and enables ventilation from the top or bottom;
//Smart Storage: A zippered pocket that adds cargo capacity and doubles as a self-stowing compartment.