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The Castelli Prologo jacket is made for quiet rides in cool or fairly cold conditions, but with an added emphasis on letting excess heat and sweat evaporate through the warmer brushed fabric on the back. It’s a structure that has been in use for a few years now and you probably already know it thanks to your Mortirolo jacket. What makes this jacket different is the marked use of color and is vaguely inspired by the classic tricolor jerseys of the past for national champions. In recent years, jackets from all brands have opted for a single predominant color, so it was thought it was time to change direction. You’ll still have the protection of the Mortirolo jacket, but you’ll be noticed on your next group winter ride.