When Castelli worked on the first aero jersey for road racing in 2006, many people called you crazy. At that time, aerodynamics were only considered important for time trials. Race clothing "only" had to be able to manage moisture. Even Castelli's aerodynamics experts were very cautious about possible savings. Castelli's aero project was called "Split Second" because they were already of the opinion that it was worth fighting for even the smallest improvements. In the course of the process at that time, it turned out that the savings were considerable, which somewhat delayed revolutionising the entire Pro Peloton. Currently you are on the sixth generation of your aero jersey. With each update you have been able to improve fit and performance. For the 6.0, you have particularly benefited from CFD analyses - especially regarding materials and seam placement. Feedback from some professionals also provided valuable insights. Version 6.0 is our most comfortable and aerodynamically best jersey yet. Watch out: They are already working on an update