The Castelli Climber's 4.0 Jersey has been developed and refined using feedback from the pros, who requested a cool jersey to use for climbing the Alps in July heat, without sacrificing aerodynamics. It's part of the official Soudal Quick-Step team kit.
Constructed from a mixture of the fastest possible 3D mesh fabrics, using the same CFD-based fabric placement and seam placement found in the Aero Race 7.0, this jersey is carefully engineered for a light weight, rapid cooling and rapid drying.
As well, since the sunshine on the Alps is strong, the back of the Climber's 4.0 Jersey has been engineered to block 90% of UV rays. Whether you're a super-competitive Alpine climber, or simply someone who enjoys a midsummer lunchtime ride, this jersey is engineered to speed you on your way when the sun is high.