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Castelli - Free AR 4.1 Limited Edition Jersey - Men's

Castelli Free AR 4.1 Limited Edition Jersey - Men's

30% Off
$104.98 $149.95
Changing the size selection, or changing the selected color after selecting a size, may change the associated price

Item #CST00MR




Tech Specs

[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

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

Great jersey for hot summer rides

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: L

Loving it so far! Tight race fit, as it supposed to be. I went with the sizing suggestions and it feels great, hugging my skin tightly so the perspiration escapes right through it... It really feels like I just sweat a lot less on 90˚+ days. I'm 31" in waist, 38" in hips and 39.5" in chest and the Large size is perfect, but if my chest, or my shoulders, was another inch bigger, I'd probably size up to XL. As it is, I don't think I have space for a base layer.

Fits true to size

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: Small

I was so psyched out reading these reviews, knowing it was an aero/tight model, wondering if I should get a bigger size. I ended up going with the small and was relieved that it fit exactly as expected--like every other small jersey I've owned (that wasn't some baggy/Fred version). Go with your gut!

Very nice but order up one size

    Great jersey and worth the money but fit is too tight. 5'10, 168 lbs. Ordered medium; returned for large.

    Fits Great

    • Fit: True to size
    • Size Bought: Large

    I'm 6ft 175lbs and the Large fits perfect. Looks great, love the larger teeth on the zipper. Length feels perfect. No issues at all. Slimmer fit then all of my other jerseys which is how it is designed. Area around bicep is very supple and stretchy. Love it. Can't wait to try it on the road.

    race jersey

    • Familiarity: I've put it through the wringer
    • Fit: True to size
    • Size Bought: Medium

    This jersey is just what it is supposed to be- super slim and well cut to fit like a second skin for maximum aero/race fit. It is very breathable and stretchy so you don't even notice it is on. Perfect for fast long rides in the saddle on hot summer days. It fits 'true to size' in that this jersey is meant to be race cut and fitted. That being said it doesn't feel tight because it is so stretchy- it is quite comfortable. It is much more breathable and light than my similar Pearl Izumi and LG race jerseys, but this comes at the cost of less durable material. You do have to be careful with the 'mesh' sleeves as they can snag easily. I wear a medium and it fits perfect.


    • Fit: Runs small
    • Size Bought: Medium

    Once again, trying on a new Castelli garment is like trying a new Italian wine.....interesting, stylish and sometimes surprising. My surprise is that the medium I ordered and tried on didn’t even come close to fitting my 66”/143lb frame. I have numerous Castelli garments and I would say this fits (I couldn’t get it around my front) like an extra small might fit. It is a very good looking jersey, but I am afraid that a large will be adequate in certain areas and too big in others. BTW, the other medium Castelli Jersey I purchased fits perfectly.......who knew?

    but its Castelli

    • Familiarity: I've used it several times
    • Fit: Runs small
    • Size Bought: large

    This is a great jersey for moderate temperatures. The fabric vents very well, but is slightly too thick to be comfortable on super hot days. Overall the fit is good, and sizing runs slightly small. The pockets are quite large and perfect for long rides where you need to carry a lot with you. In addition, there is a small zip pocket for keys or your phone.


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    How to Measure:
    For best results, take measurements over your underwear.
    Measure under your arms, around the fullest part of your chest.
    Measure around your natural waistline, keeping the tape a bit loose.
    Measure around the fullest part of your body at the top of your legs.
    Using pants that fit well, measure the crotch seam to the bottom of the leg.