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Free AR 4.1 Limited Edition Jersey - Men's

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Temporarily Out Of Stock

Don't get too bummed. This item is on the way and will be available for purchase as soon as it rolls into the warehouse.

Can't wait? Consider one of the other Men's Short Sleeve Road Bike Jerseys we have in stock.

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Free AR 4.1 Limited Edition Jersey

Previously an exclusive jersey for pros competing on the World Tour, the Castelli Men's Free AR 4.1 Limited Edition Jersey saves approximately 12 watts at 40 kilometers per hour, compared to a traditional race-fit jersey. Seeing it's designed to shave split-seconds from competitive racing pursuits, you'll find the aero, race-specific cut hugs your body like a second skin. However, it's fabricated with a high degree of stretch, so you'll retain full range of motion and remain comfortable across long distances.

Now that it's available for us mere mortals, Castelli updated it with all the bells and whistles to maximize functionality on everyday rides, including a rear-zip pocket for securing essentials on the road. The jersey itself is comprised of Velocity dimpled fabric along the front and shoulders to improve the aerodynamic efficiency, subsequently shaving precious time from your racing and training pursuits. Castelli didn't stop there with aero design details, going one step further by placing Nervato fabric along the armholes for a slippery, resistance-cutting effect.


  • Race jersey originally designed for pro cyclists
  • Aero cut saves 12 watts at 40 kilometers per hour
  • High degree of stretch promotes long-distance comfort
  • Velocity dimpled fabric at front panel for aerodynamics
  • Nervato armhole fabric for slippery, streamlined profile
  • Rear-zip pocket maximizes functionality for everyday rides
  • Mesh raw-edge arm grippers, silicone gripper elastic waist
  • Full-length YKK Vislon zipper with neck protector
  • Item #CST00MR
[body] Velocity dimpled fabric, [armholes] Nervato
Aero (form-fitting)
full-length YKK Vislon zip
3 rear, 1 zippered rear
reflective heat-transfer viz strips
Recommended Use
road cycling
Manufacturer Warranty
1 year