A speedy favorite, refined.

Putting on the Castelli Free AR 4.1 Men's Jersey won't be enough to win you a spot on the podium of your next race all by itself, but it might help. Formerly a pared-down racing jersey, the Free AR 4.1 retains its competition pedigree with a further transition towards an all-around, everyday training jersey. Castelli employs its most streamlined fit for the Free AR, stitching Velocity fabric into a contoured, flexible design that will move with you through the rigors of a race, reducing drag by ushering air over its dimpled surface without feeling restrictive or tight.

More recent additions like ventilated Nervato underarm panels and soft raw-edge arm grippers lend the Free AR more watt-saving style and long-term comfort this year, and other details like a neck-saving zipper flap and a practical zippered pocket, unnecessary when the original Free AR was created, make this a piece you shouldn't hesitate to throw on before a pre-race taper ride or mid-season training day with your ride group.

  • Ride in a jersey with race pedigree and luxurious extras
  • Form-fitting, contoured cut reduces drag in a race
  • Dimpled, aerodynamic Vortex fabric wicks moisture
  • Neck protector shields against zipper
  • Zippered rear pocket stashes keys or cash
  • Silicone gripper at waist holds jersey in place
  • Reviews
  • Q & A

Wrong size and fit

  • Familiarity: I returned this product before using it
  • Fit: Runs small

The jersey looks amazing and and it has some of the most advanced features I've ever seen in a road jersey. HOWEVER, it runs small - very small. I returned the S, the M, and the L. It's not just the size that is wrong. It's also the fit. It pulls up tight in the armpits and it shows tightness creases starting from the armpits over the pectorals. Every return costs money. Castelli made a mistake here. Or maybe it's just a bad batch. (I'm posting through my wife's account - in case you wondered about the name)

castelli free at 4.1 full_zip jersey

  • Fit: True to size
  • Size Bought: XXXL

the jersey fits well ,had to return the first one it was to small this one fits well and looks very well

This fit my 10 yr old

  • Fit: Runs small

Careful in ordering process -- if you need to return, they charge you. I would have no issue with this if the fit was standard. Oh, and if I hadn't spent $350!

As it happens, coincidentally, I gave mine to my 10 year old grandson. Way small.

Excellent jersey, but was too small

  • Familiarity: I returned this product before using it
  • Fit: Runs small
  • Size Bought: XL

Wanted to provide a some info that might help others when they order. Loved the jersey but returned it as I ordered a size too small. At 6' 2", 175 lb., 42 " chest I thought an XL would fit, but It was too tight and uncomfortable once zipped. I would suggest XXL for my size

Castelli free AR 4.1 Jersey

  • Familiarity: I've put it through the wringer
  • Fit: Runs small
  • Size Bought: XXL

Best fitting Jersey I've bought in a long time. Ex-bodybuilder/Powerlifter. One problem I've had in the past is the back of Jersey hangs really low when back pockets are full. Not with this Jersey. The silicone grippers help hold the Jersey in place even when the pockets are full. Highly recommend this Jersey.