The Castelli Aero Race 8S Jersey is built for riders chasing pure speed. In a sport where 80% of drag comes from the body, optimizing your kit is one of the most effective ways to go faster. The “S” stands for “speed,” and this jersey earns that title through over a decade of aerodynamic research and pro-level performance insights. CFD-based fabric placement and seam construction have been used to minimize drag, while the engineered ribbed shoulder fabric provides a significant aerodynamic advantage—delivering up to a 6% reduction in CdA compared to previous aero jerseys. Bonded sleeve endings add a smooth, low-profile finish that enhances both comfort and speed.

While built for maximum aerodynamics, the Aero Race 8S Jersey doesn’t compromise on comfort. The lightweight, stretchy body fabric offers excellent breathability and a race fit that moves with you. Elastic at the waist keeps the jersey securely in place and supports the three rear cargo pockets when fully loaded. Additional details like the full-length YKK® Vislon® zipper allow easy on-the-fly ventilation, while reflective tabs add visibility in low-light conditions. At just 142g and ideal for temperatures between 18°C and 35°C (64°F to 95°F), this jersey turns your watts into real speed.