Castelli Climber's 4.0 Jersey Discover excellence in performance with the Castelli Climber's 4.0 jersey, designed to maximize your aerodynamic efficiency and cooling during the most demanding climbs. Light and breathable, this jacket is your perfect ally to face high temperatures.

• Material: Bluesign® certified fabrics for a lower environmental impact.
• Knitting technology: Flusso 3D on the front, StradaPro 3D on the back.
• Breathability: StradaPro 3D back for optimal ventilation.
• Water resistance: N/A.
• Fit: Race slim fit, elastic sleeves, elastic waist.
• Weight: 164 g, ideal for temperatures from 22°C to 40°C.
• Specific technology: CFD-based fabric distribution, Airflow shoulder structure, YKK® Vislon® zipper.

Reach the summit in style: Castelli Climber's 4.0 Jersey The Castelli Climber's 4.0 jersey redefines the concept of high-performance clothing for demanding cyclists. With a design focused on aerodynamic efficiency and superior cooling, this garment is your best companion to conquer the peaks on the hottest days. Revolution in Fabric With the innovative combination of Flusso 3D on the front and StradaPro 3D on the back, the jacket guarantees unprecedented breathability and optimized aerodynamics. Superior Breathability The StradaPro 3D back structure facilitates effective ventilation, keeping you cool as you climb. Unparalleled Fit and Comfort A precise Race fit, complemented by elasticated elbow-length sleeves and smart elastic at the waist, ensures the jacket stays in place, adapting to your movements without restriction. Details that Make the Difference From the strategic fabric distribution based on CFD studies to the use of a high-quality YKK® Vislon® zipper, every detail has been carefully selected to give you performance and durability.