When Castelli engineered the first aero jersey for road racing back in 2006, everyone thought they were crazy, even a few of the pro riders. Back then, aero was only for TTs. Performance clothing meant moisture management. And you could win the Tour de France with a baggy jersey that was little more than a polyester T-shirt with pockets on the back. Even Castelli’s aerodynamic consultants expected limited, if any, gains, so Castelli named the jersey the Split Second. In the end, the gains were pretty substantial, and Castelli completely revolutionized the look of the pro peloton. Castelli is now on the seventh major revision of that jersey, and they have found even more gains. Still heavily benefitting from CFD analysis of wake flow in the riding position for fabric and seam placement, along with pro rider feedback, the Castelli R-A/D Full Zip Short Sleeve cycling jersey is both fast and comfortable for long days in the saddle.

Product Features

• CFD-based fabric placement and seam construction
• Castelli engineered Air_O Strecth fabric for breathabiity, comfort and stretch
• Engineered for aero efficiency at 30 to 55 km/h
• Airflow shoulder construction
• Elbow-length stretch sleeves with raw-cut edge
• Elastic around waist to keep jersey in place and support pockets
• YKK Vislon zipper
• Contains bluesign certified fabrics