Castelli Climber's 4.0 Jersey

Racing in the Alps in July is reserved for only a few, but the products that emerge from it are absolutely amazing for the rest of us. This jersey was designed for hot days in the high mountains, relying on direct feedback from professionals. They wanted a jersey that keeps them cool on hot days without compromising aerodynamics. The Climber’s 4.0 jersey uses the same CFD-based seam construction as the Aero Race 7 jersey, but incorporates the most aerodynamic 3D mesh materials to ensure optimal cooling. These fabrics are also particularly soft and stretchy, providing a comfortable fit that is essential for long days in the mountains. And since this jersey is intended for use in direct sunlight, the fabric on the back blocks 90% of UV rays.