ENDURANCE X2 BIBSHORTLONG DISTANCE MADE EASYOR EASIERWeve engineered everything in this short to make your longest rides just a little bit more comfortable. Everything Castelli does is geared toward speed & we know that means doing some long rides. We stay with the proven comfort of our Progetto X2 Air seat pad use new Endurance Evolution fabric for muscle support & give the short a perfect eight-panel anatomic fit & our Giro 3 leg gripper. Of particular note is the bib construction which weve engineered to accommodate those cyclists whose long rides are primarily to burn calories. Endurance Evolution fabric provides optimum muscle support & feels dryer in nearly all conditions Newly engineered bib strap construction is comfortable on a wide range of body shapes New enhanced Progetto X2 Air seat pad for even greater comfort Giro 3 leg grippers lie flat Rear reflective tabs Heat transfer logos