Inspired by the most innovative bibshort ever. In 1998 Castelli rocked the world of cycling shorts with the Progetto Y. It had a new innovative 220-gram Lycra fabric, eight panel true anatomic construction, innovative silicone gripper elastic, mesh bibs and that spectacular anatomic Progetto Y seat pad. Progetto Y was the inspiration for the Castelli Evoluzione Bib Short, with each of those components updated to make an extraordinarily comfortable performance short. Of particular note is the new ProDry 2Strati fabric, which uses a polyester inner layer with a nylon outer layer to move moisture away from the skin while gently compressing. The Progetto Y was the top-of-the line short when it debuted, and this is certainly a worth successor.