About the Castelli Prologo Jersey The Prologo name is Italian for prologue, the opening salvo in a Grand Tour. But many of our customers pronounce it like Pro Logo. And we don\\\'t mind at all. The Prologo Jersey, now in its sixth generation, does feature a big logo, but more than that it brings a lot of tech directly from our experience with pro racingThe fabric is remarkably soft yet stretchy and features bioceramic nanoparticles added to the fused polymer, which reflect far infrared light to both protect you from hot sun and help the body keep itself warm. The construction also borrows a lot of cues from pro racing: the same drop-tail construction that helps the jersey sit right around the waist while allowing generous pockets that sit lower on the back, the wraparound side panels that ventilate the back without letting in too much air from the front, and the easy-sliding YKK® Vislon® zipper. Key Features > New Punto fabric is light and breathable > Drop tail with 3 rear pockets and internal silicone waist elastic on back > Horizontal stretch for great fit, with limited vertical stretch to support pockets > Castelli shadow logo sublimation overprint on dyed base fabric