Assos Mille GTS Spring Fall Cycling Vest S11

The Assos Mille GTS Vest S11 is a wind-rain shell vest built for the temperature swings of spring and fall riding, roughly 53.6°F to 68.0°F. It pairs two fabric systems in one garment: a waterproof, windproof CORE Light softshell across the shoulders and chest, and a high-stretch, midweight LITHIUM Medium insulation panel across the belly. That split construction sets it apart from a standard vest — the zones that take the brunt of wind and rain get a membrane barrier, while the core gets stretch and warmth without added bulk.

At 152 grams, the vest packs down small enough for a jersey pocket (Packability rated 4/5), yet it holds a water column above 25,000mm with windproof and waterproof scores of 3/5 each — enough to handle a shoulder-season shower without the weight of a full rain jacket. Breathability is rated 4/5 with an inverted cup rating of 13,400 g/m²/24hr, and a lightweight rear panel further regulates internal temperature. Assos rates it 5/5 for endurance riding and 4/5 for adventure use — a layering piece for long days rather than a criterium accessory (racing use is rated 2/5).

Who It's For

•        Riders on long endurance or adventure rides in spring and fall shoulder-season conditions who need wind and light rain protection without bulk.

•        Riders who already layer over a jersey — raw-cut cuffs are built to sit under the GT Spring Fall Jersey C2 sleeve without added volume.

•        Riders who value packability for rides where conditions change mid-route.

•        Consider a different piece if you need sustained warmth (insulation rated 2/5) or all-day rain protection — this is a wind-rain shell, not a full rain jacket or racing vest (racing rated 2/5).

What to Look For

•        Fit: regular cut sized to layer over a jersey — check it against your usual jersey since raw-cut cuffs sit under sleeves without bunching.

•        Temperature range: matched to 53.6–68°F with wind and light rain exposure — outside that window, plan on additional layers.

•        Riding style: built for endurance (5/5) and adventure (4/5) use rather than racing (2/5) or aero-focused riding (aero properties rated 2/5).

Key Features

CORE Light softshell: a waterproof, windproof membrane sits across the shoulders and chest, where wind and rain hit first, giving a barrier there without the bulk of a full jacket.

LITHIUM Medium panel: high-stretch, midweight insulation across the belly keeps the core warm while preserving movement in a forward riding position.

Weatherproofing: a water column above 25,000mm with windproof and waterproof scores of 3/5 each handles wind chill and light rain without true rain-jacket weight.

Breathability and venting: a 4/5 breathability score and 13,400 g/m²/24hr inverted cup rating, backed by a lightweight rear panel dedicated to venting, keep climbing efforts from overheating.

Fit and layering: raw-cut cuffs remove seam bulk so the vest sits cleanly over the GT Spring Fall Jersey C2 sleeve without pinching.

Sustainability: OEKO-TEX certified and PFAS-free fabric, worth knowing if you track chemical treatments in weatherproof gear.

Rider Intent Summary

•        Biggest strengths: pairs a windproof and waterproof shoulder-and-chest membrane with stretch insulation at the belly in a 152-gram vest, rated 5/5 for endurance and 4/5 for breathability.

•        Tradeoffs: insulation (2/5) and aero properties (2/5) are both light — built for shoulder-season versatility, not deep cold or racing.

•        What makes it different: dual-zone construction (CORE Light at the front and shoulders, LITHIUM Medium at the belly) plus raw-cut cuffs sized to layer over the GT Spring Fall Jersey C2.

Victory's Take

We like the Mille GTS Vest S11 for riders tackling long, unpredictable spring and fall rides who don’t want to carry a separate rain jacket and gilet — at Victory Bicycle Studio, we see it working best as a packable layering piece over the GT Spring Fall Jersey C2, not as standalone cold-weather insulation.