Aero arm sleeves built for time trial and TT-suit use. These are the same rib pattern seen running down the arms of Castelli's pro riders — raised aero trip strips that disturb airflow to make your TT suit measurably faster.
- Aero trip ribbing for a genuine aerodynamic gain
- Designed to pair with TT suits
- Long-sleeve coverage from wrist to shoulder
- Race fit


