Giro39s mens chrono expert bib is the foundation of a great ride and the result of countless hours spent in trials and testing with the ultimate goal of making it go unnoticed on the bike giro use premium italian materials to ensure the appropriate compression and comfort and designed the entire piece so that each seam moves with you the custom chamois is anatomically shaped for comfort while stretch mesh bib straps work with your body in motion the mesh also allows your body to breath