Castelli Prologo VI Jersey; The Prologo name is Italian for prologue, the opening salvo in a Grand Tour. Many many people pronounce it like Pro Logo. but don\'t worry Castelli 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 technology directly from Castelli\'s experience with pro racing. The 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. Features: New Punto fabric is light and breathable Horizontal stretch for great fit, with limited vertical stretch to support pockets Covered YKK Vislon zipper Castelli shadow logo sublimation overprint on dyed base fabric Drop tail with 3 rear pockets and internal silicone waist elastic on back Reflective piping