Castelli Prologo 7 Short Sleeve Jersey Look and feel great in the Castelli Prologo 7 Short Sleeve Jersey. It's designed for comfort on all types of warm weather rides and pairs micro-piqué polyester knit to the front and back with Velocity Rev2 on the sleeves. The result is excellent moisture management, high stretch, sun protection and a fit that suits a range of body shapes. Three rear open pockets are built into the design, providing ample storage space, and the full-length zip makes it easy to cool down fast as effort or temperature increases. The garment is cut with a slightly more relaxed fit than Castelli's race jerseys, but not one that will feel overly baggy. Reflective details make a nice finishing touch, improving visibility in low light.