The Castelli Free Aero Race Bib Short, new and updated for 2015. The Castelli designers studied and improved on every detail on this, the new Free Aero Race bib short. Every component of the Free: every fabric, every construction method, every stitch was appraised, considered and redesigned in the pursuit of perfection. The lines are still classic free, but in fact only the mesh fabric in the bib straps carries over from last year. Every other component and aspect has been redesigned, obsessed over and rigorously tested until the designers were satisfied. The key updates are in the seat pad, the bib strap construction, the waistband construction, plus all-new fabrics and pattern work that went through a vast amount of iteration until fit perfection was achieved.