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The Climber's 4.0 is Castelli's lightweight jersey for the hottest days and the longest climbs. A race fit and a 3D mesh back keep airflow high and weight low when the temperature is pushing 40°C.
Airflow-focused shoulder construction and fabric placement shaped with CFD testing help the jersey stay cool and quiet at speed, with raw-cut elbow-length sleeves that sit flat on the arm.
- Flusso 3D fabric at the front and StradaPro 3D mesh at the back for breathability and stretch
- Back fabric blocks 90% of UV rays
- Includes bluesign® certified fabrics
- Raw-cut, elbow-length stretch sleeves
- Elastic waistband keeps the jersey in place and supports the pockets
- YKK® Vislon® zipper
- Temperature range: 22°C - 40°C
- Fit: Race