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As winter temps start to blow in, we roll out wearing the Castelli Passista FZ Jersey. The plush, fleecy interior helps combat icy winds by holding in warm air yet still lets our microclimate breathe easy, so we don't overheat on climbs and sprints. To stay fueled, we slip our bars and gels in the back pockets for easy access, and to boost airflow when the sun comes out to play, we release the front zipper.