The Castelli Neo Prologo Jersey is for the young rider who is beginning to learn how to handle a bike for fun and for competition. The Microfiber 100% polyester fabric dries instantly, fits comfortably close and stays in places thanks to the stretchy fabric and silicone elastic at waist. The YKK Vislon full-length zipper is easy to open when extra ventilating air is needed on hot summer rides. If you only want to invest in one cycling jersey for your child, the Neo Prologo youth jersey is a good choice. It’s comfortable in mild fall and spring weather as well as hot summers.