--- title: "Partner Product Launch: New Castelli Perfetto RoS 3 Jacket X Polartec®" date: 2025-09-16T06:04:00-07:00 author: Luana Domanti canonical_url: "https://www.polartec.com/news/partner-product-launch-new-castelli-perfetto-ros-3-jacket-x-polartec" section: News Entries --- [Skip to Main Content](#main-content-wrapper) Accessibility Feedback Contact Us. ![Foreground Image](https://polartec-polartec.transforms.svdcdn.com/production/img/Polartec-P.R.-Castelli-News-Entries-Details-950x1080_2025-09-12-094815_rkul.jpg?w=950&h=1080&auto=compress%2Cformat&fit=crop&dm=1757670495&s=a3fadd917b1c3127c9888c2cd4b62ca0) [ News Hub. ](https://www.polartec.com/news) Main Story. 09. 16. # Partner Product Launch: New Castelli Perfetto RoS 3 Jacket powered by Polartec® AirCore™ ![5 Polartec P R Castelli Article](https://polartec-polartec.transforms.svdcdn.com/production/img/5-Polartec-P.R.-Castelli-Article.jpg?w=450&h=450&auto=compress%2Cformat&fit=crop&dm=1757599905&s=c758f77adf59ef12e051dabf5c216705) ![2 Polartec P R Castelli Article]() ![1 Polartec P R Castelli Article]() ![3 Polartec P R Castelli Article]() ![4 Polartec P R Castelli Article]() ![6 Polartec P R Castelli Article]() **Introducing Castelli’s new Perfetto RoS 3 Jacket**, **where high-tech weather protection is enhanced by maximum breathability to help optimize your performance**. Just in time for the AW25 cycling season, **Castelli has redefined its iconic Perfetto RoS Jacket to deliver ultimate performance in all conditions**, without compromise. The new Castelli Perfetto RoS 3 Jacket – where **ROS stands for Rain or Shine** – is **built entirely with** [**Polartec® AirCore™**](https://www.polartec.com/fabrics/weather-protection/aircore), a **pioneering new non-PFAS fabric engineered to deliver true breathability without sacrificing weather protection**. With Polartec® AirCore™, the Perfetto RoS 3 Jacket **leverages the power of controlled airflow to manage moisture** more efficiently than traditional options, **keeping riders dry, warm, and comfortable** **from the inside out**. Unlike conventional waterproof jackets that trap heat and moisture, **Polartec® AirCore™ is air-permeable (0.7 CFM)**, allowing **excess sweat to escape while maintaining wind resistance**. It also has a functional **water resistance rating of 5,000 mm hydrostatic head**, which is more than enough to handle the strongest rain and gusts. What’s more, Polartec® AirCore™ **also regulates the rider’s microclimate through active ventilation**. The fabric stretches with the body, adapts to intensity, and delivers **breathable performance** that accelerates when you do. **An intelligent weather protection solution for a temperature range of 4–14°C (39–57°F)**, the Perfetto RoS 3 Jacket redefines what’s possible on the bike. Available now in men’s and women’s fits and in multiple color combinations, the Perfetto RoS 3 Jacket marks the start of a new era in cycling apparel powered by air and built to go further. [ Get it now. ](https://www.castelli-cycling.com/aircore) Share. 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