# Assos Mille GT S11 — The Endurance Line Grows Up

> Two years after the S11 debut with the Equipe RS, Assos brings the new generation to the Mille GT and Uma GT endurance line. AirCell jersey with 25% less weight, QUARTZ bib shorts from 80% recycled polyamide, and racing technology for the long haul.

- Published: 2026-02-02

On 2 February 2026, Assos brings the [S11 generation to the Mille GT and Uma GT line](https://endurance.biz/2026/industry-news/assos-launches-mille-uma-gt-s11-endurance-collection/) — two years after the S11 debut with the Equipe RS. The wait had a reason: Assos wanted to transfer racing technologies to the endurance line, not simply build cheaper versions of the RS.

## Jersey: AirCell and Eclipse

The **Mille GT Jersey S11** weighs [25% less than its predecessor](https://www.bikeradar.com/features/first-look-friday/assos-mille-gt-kit-2026). The main body uses **AirCell**, an ultralight circular knit with an open hexagonal pattern that delivers air circulation and elasticity simultaneously. For the sleeves, **Eclipse** is used — a warp-knit material with a soft hand feel and UPF 50+.

That sounds like marketing speak, but the difference from the C2 generation is noticeable: less weight, better cooling, more modern silhouette.

## Bib Shorts: QUARTZ and Recycling

The **Mille GT Bib Shorts S11** bring the bigger surprise. The new [**QUARTZ textile**](https://www.rouleur.cc/en-us/blogs/desire-journal/assos-mille-uma-gt-s11-collection) offers breathable compression with permanent odour control — and is made from 80% recycled pre-consumer polyamide. Assos and sustainability haven't been an obvious pairing so far, but here a first step becomes visible.

The legs are cut longer than the predecessor. The **rollBar strap system** — removed on the RS S11 — stays on the Mille GT. The logic: endurance riders sit more upright, the chamois needs more vertical stabilisation. **PILtec Plug-In** at the leg endings grips in wet and dry conditions.

## Colours and Price

At launch, the [collection comes in blackSeries and Foundation Green](https://www.bikeworldnews.com/2026/02/02/inside-the-new-assos-mille-uma-gt-s11-collection/). More colours follow seasonally. Price-wise, the Mille GT S11 sits below the Equipe RS but above many competitors — you pay for Swiss development and European manufacturing.

## Assessment

The Mille GT is the line most Assos customers actually wear. Not everyone races, but everyone likes to ride comfortably. With the S11, the Mille GT closes the technical gap to the RS without adopting its uncompromising race fit. For the Sunday ride and the Alpenbrevet alike.

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Source: https://kilometro.ch/en/articles/assos-mille-gt-s11-the-endurance-line-grows-up