The Castelli Aero Race 5.1 Jersey FZ is Castelli's most aerodynamic jersey ever produced and builds upon the race-leading aerodynamics from its predecessors. Comfortable, durable and also features updated fabrics on the front and back, which showed at least a 2 watt gain in the wind tunnel.. Talk about incremental gains. Aside from the aerodynamics it is also extremely light-weight, coming in at 103g. The polyester fabrics that make up this jersey dry nearly instantly, making this the best choice even for cool- or wet- weather racing/riding. The compression band around the pockets keeps them from moving or bouncing no matter how you load them up, so load up on gels and essentials without the worry of things just mysteriously disappearing mid-ride.
The most aerodynamic racing jersey we've ever made.
Saves approximately 20 watts at 40 km/h compared to a normal race-fit jersey
Velocity Dry fabric on front
Mesh arm bands.
Full-length YKK® Camlock zipper
Compression band around waist keeps 3 rear pockets in place.
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