The entry level Castelli Entrata VI Jersey is designed with many of the technologies used in Castelli’s race level jerseys making it one of Castelli’s top selling jerseys at an entry level cost. The shoulders made with the four-way stretch Air Mesh fabric and raw-cut sleeve endings fit close without limiting mobility. You can stretch forward onto the handlebars without restrictions and still be completely aerodynamic. This design is not only aerodynamic, but also amazingly comfortable. The main body fabric is a performance fabric that is lightweight and durable. The jersey blocks wind while circulating air so you don’t overheat. You’ll be protected from the chill of a cool morning ride, and when it becomes scorching hot, the fabric wicks moisture away from your body and circulates air. You will stay dry and cool. When you need extra cooling, the YKK Vislon zipper is easy to unzip for extra ventilation. The Entrata is stretchy for great fit and the UPF 30 sun protection filters 97% of UV rays. Silicone gripper elastic at waist keeps the jersey from riding up and 3 rear pockets with an extra stretch insert won’t bounce around when loaded up with riding food.