The main fabric on the body is a blend of polyester with a little Lycra® for a perfect fit and excellent control of breathability. It is based on the same Velocity Rev3 fabric that we use in our Aero Race Jersey, but we have put 20% more to ensure excellent performance but in a more versatile garment and to support the best pockets. We use a 3D mesh fabric along the shoulders, plus a flat mesh on the side panels. The pockets are a little wider than those of running jerseys, so they can be more roomy, and there is a zippered pocket for keys and money.