The Castelli Aero Race 7. 0 Limited Edition Jersey keeps us feeling our best as we break KOMs in our training to reach the top of the podium. With the Castelli-engineered Air_O Stretch fabric, we move freely in the saddle with unmatched comfort, fly through the wind with aerodynamic efficiency, and stay at the perfect temperature on a hot, sunny day. With three rear pockets supported by the elastic at the waist, we can comfortably stuff every snack, tool, and phone we need for a long day in the saddle.