Now in its fifth generation, the Prologo Jersey has never been more true to the original concept behind it: designed to be your favorite jersey. We??¢ve kept the outstanding moisture management of the Stratus+ two-layer fabric and the relaxed Prologo fit, but we??¢ve updated the details, from the collar construction that protects your neck from the zipper to the embossed chest with the Castelli shadow logo. The design feels instantly classic, while the performance is distinctly modern.