UMA GT Jersey S11 Boss x Assos

160,00 EUR
Part of the BOSS x ASSOS capsule, the GT Jersey S11 Monogram pairs precise technical construction with the distinction of iconic style. It’s built on the endurance-tuned GT S11 platform, our most breathable, lightest endurance jersey.

74%Polyester 14%Elastane 12%Polyamide

Within thirty (30) days of receipt.

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Behind the product
Equal parts BOSS elegance and ASSOS engineering, the S11 Monogram is a technical, elegant solution for the hottest conditions. The body is engineered with two new, ultralight textiles for breathability and cooling airflow that rival the EQUIPE RS while maintaining the GT’s comfort-tuned fit, and it weighs 25% less than the standard GT C2 EVO jersey. The sleeves are also updated with trickledown technology from the Racing Series, providing ultrabreathable, muscle-wrapping support inspired by racing equipment but shaped for streamlined comfort. The Jersey S11 Monogram is so lightweight, breathable, and cooling that we recommend wearing sunscreen beneath it.

Technology overview

The finer details


The main body textile is AirCell, a new, ultralight circular knit with an open hexagon pattern that breathes, wicks, cools, and even feels like a Racing Series jersey. AirCell’s bistretch qualities provide elastic, body-wrapping stretch horizontally with vertical support. The rear pockets are further supported by the lightweight Stabilizer V11 mesh, cooler and more breathable than the standard GT version. Sleeves of Push Pull maintain a race-inspired silhouette with low-weight, low-volume, highly elastic comfort and UPF 50+.

Cut in our streamlined regularFit for total comfort on long rides. Set-in sleeves increase freedom of arm motion while stabilizing the shoulder panels.

Raw-Cut Sleeves:
Race-inspired construction that eliminates transitional ridges for clean lines and aerodynamics.

Triple Ramp Pockets:
Flexible panel “lids” secure and stabilize pocket contents. The pockets’ upper halves are hyperelastic for added capacity, but the lower halves add firm vertical support to prevent sagging.

PILtec Plug-In:
The rear hem features a lightweight, ultrabreathable textile band with a microdot silicone treatment that stabilizes the jersey’s back panel and maintains grip while wet.


For iconic, timeless elegance with the full benefit of technical performance, pair the Jersey S11 Monogram with the complete BOSS x ASSOS capsule, including the Bib Shorts C2, GT Wind Vest C2, and full suite of ASSOSOIRES.