Castelli’s Puro 2 Jersey FZ is the same jersey that you see on the Cannondale Pro Cycling Team riders. They love it as the perfect cool weather training piece, & if you keep a close eye you will even see it used in races. It is a simple, but incredibly effective design. With warmer fabric on the body to keep your core warm, X-Stretch fabric on the sleeves to eliminate flapping fabric & a YKK Vislon zipper for an easy up/down even when you’re on the move, Castelli have addressed everything. Just one ride & you will change your idea of how good a thermal jersey can be.