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Product Images

Castelli Mens Fly Jack-sey Clay/Tarmac
Castelli Mens Fly Jack-sey Clay/Tarmac
Castelli Mens Fly Jack-sey Light Black
Castelli Mens Fly Jack-sey Light Black
Castelli Mens Fly Jack-sey Vivid Blue/Belgian Blue
Castelli Mens Fly Jack-sey Vivid Blue/Belgian Blue
Castelli Mens Fly Jack-sey Clay/Tarmac
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Castelli Mens Fly Jack-sey 2
Castelli Mens Fly Jack-sey 5
Castelli Mens Fly Jack-sey 1
Castelli Mens Fly Jack-sey 4
Castelli Mens Fly Jack-sey 3
Castelli Mens Fly Jack-sey 6
Castelli Mens Fly Jack-sey 7

Castelli Men's Fly Jack-sey

Pricing and Order Section

Mfg PartNum:
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MSRP: $249.99
In Stock Now
This color/size is not eligible for Podium Club points
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Qualifies for Free Shipping!


Jacket? Jersey? Jack-sey!

The Castelli Men's Fly Jack-sey is for those days when you aren't sure if you need a jacket or just a jersey with warmers. The Fly Jack-sey hits that sweet spot when it's in between temperatures while offering protection just in case. It features brand-new lightweight construction with Castelli FLY Fabric Technologies: FFT and treated with a water-repellent finish to help keep you dry. All this in a super-lightweight piece.

The Jack-sey offers all the protection you need, with GORE-TEX INFINIUM™ WINDSTOPPER® lining on the front. The FLY SL shell outer layer has a water-repellent finish to keep you dry, and the amazingly light CLIMA SL insulation is just enough to keep the chill away. The low/no collar sits close so that no unwanted air goes down inside, but not having a collar helps with temperature regulation. When you can't decide what to wear, you reach for the Jack-sey.


  • Super-lightweight construction with amazing warmth and protection
  • Low/no collar for temperature regulation
  • Castelli FLY Fabric Technologies: FFT
  • CLIMA SL Insulation for extra warmth
  • FLY SL Shell for wind and rain protection
  • 100% recycled post-consumer outer shell and lining
  • Top and bottom-opening YKK® Vislon® zipper
  • 3 back pockets with zippered security pocket for valuables
  • Elastic and silicone at waist to keep Jack-sey in place
  • Reflective tabs for added safety
  • Weight: 221 g
  • Temperature: 9°C - 17°C / 48°F - 63°F

Free Exchanges: This product qualifies for free exchanges within the first 60 days after order. We'll cover the shipping both ways for US customers if you need a different size and/or color of this product. Returned product must be in new condition with all labels and packaging. Free exchanges apply only for product in stock or available for backorder.

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.

Size Chart




Sleeve Type: Long Sleeve 

Light Black - Small

Mfg PartNum: B4523503085-2 

Light Black - Medium

Mfg PartNum: B4523503085-3 

Light Black - Large

Mfg PartNum: B4523503085-4 

Light Black - X-Large

Mfg PartNum: B4523503085-5 

Light Black - 2X-Large

Mfg PartNum: B4523503085-6 

Clay/Tarmac - Medium

Mfg PartNum: B4523503294-3 

Clay/Tarmac - Large

Mfg PartNum: B4523503294-4 

Clay/Tarmac - X-Large

Mfg PartNum: B4523503294-5 

Vivid Blue/Belgian Blue - Medium

Mfg PartNum: B4523503432-3 

Vivid Blue/Belgian Blue - Large

Mfg PartNum: B4523503432-4 

Vivid Blue/Belgian Blue - X-Large

Mfg PartNum: B4523503432-5 

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