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Developed by Castelli for pro riders, the aerodynamic Castelli Free AR 4.0 Jersey FZ will cut valuable seconds off your ride. Special Velocity Dry fabric on the front and shoulder panels provides a smooth, clean fit to reduce boundary layer drag and delivers excellent wicking and faster drying. Wide, flat Giro3 sleeve cuffs maintain a flat, aero profile while the silicone waist gripper secures jersey placement. A full length front zipper puts custom venting at your fingertips and other details include two rear reflective tabs and three elasticized rear pockets.