Our lightest and most breathable summer cycling jersey Castelli Climber's 3.0 is designed primarily for very hot weather. Version 3.0 has been upgraded especially the cut that we have taken from the model Aero Race 6.0. Summer rides in the Alps are popular with many cyclists. That's why we created the Climber's jersey, which will make these climbs a bit more pleasant and comforty for these cycling enthusiasts. The jersey is lightweight and thanks to the fabric construction, airflow is more efficient, which ensures quick drying of this model. Thanks to the same cut as used on the Aero Race jersey is secure enough aerodynamics. The fibers used on the back side prevent the passage of up to 90% of the UV rays. Even if you are not riding the Galibier, the jersey will become popular especially thanks to the softness of the material and cut, which nicely adapts to the character, but especially appreciate how it keeps you dry on the hottest summer days. Or it will become popular precisely because it is also liked by professional riders. They use it in wet weather because it is almost non-absorbent.