Assos Equipe RS Johdah Ultraz Winter Jacket S11 EVO

The Assos Equipe RS Johdah Ultraz Winter Jacket S11 EVO is Assos's top-tier winter jacket, built from seven textiles and nineteen components into a single race-cut shell engineered for cold-weather training and racing. The outer layer uses Assos's 2L DIAMOND softshell, rated at 16,000 g/m²/24h for moisture vapor transfer, so the jacket sheds sweat during hard efforts instead of trapping it against the skin, a common failure point in heavier winter jackets.

Underneath the shell sits an integrated INTRABOOSTER gilet built from a 4-way stretch LITHIUM textile, giving the jacket a built-in insulating layer rather than relying on bulk alone for warmth. Assos backs this with a body-mapped construction, using ZigZaggy foam on the sleeves for muscle support and additional wind protection, and a thermoregulating OSMOS textile on the back panel where airflow exposure is lower and warmth retention matters more than breathability. The result is a winter jacket that fits close to the body, second-skin style, rather than the looser, more insulated cut typical of casual cold-weather cycling wear.

Assos's Valvetec Diffuser ventilation system sits at the shoulders, a patented construction that injects cooling air between two overlapping fabric layers to manage heat buildup during high-intensity climbs or hard efforts in the cold, without requiring a full zip-down to vent. The jacket comes in Assos's blackSeries colorway and is sized XS through 2XL. This is a jacket built for riders who train and race through genuine winter conditions and need a shell that performs at pace, not one meant for casual cold-morning coffee rides.