MicroSensor Fabric. MicroSensor® -Mesh Bib. 08' 3D Pro Chamois with Carbon Reflex thread for added heat dispersion. Center back mesh panel strategically placed for added ventilation under jersey pockets. Flatlock stitching for smooth comfort against skin. Content: Short: 69% Nylon/16% Polyester/15% Lycra® Bib: 83% Nylon/17% Spandex