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Castelli Ultraleggera Full-Zip Short Sleeve Jersey

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Item # CST0558

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Item # CST0558


Castelli's Ultraleggera Full Zip Short Sleeve Jersey is their lightest jersey. Made from their SGO.6 polypropylene mesh, it's cut to hug your torso and to eliminate any excess fabric flapping about when you battle into the wind. The polypropylene fibers in the fabric are hollow. This is the reason for the extreme lightness of the Ultraleggera Jersey. One of the fiber's advantageous properties is that it doesn't absorb water. After all, what good would a lightweight jersey be if it soaked up water like a sponge, got heavy, and stretched out of shape over the course of a summer afternoon ride? So it's light whether wet or dry, and the fabric is knit as a mesh. This all but guarantees its coolness when you're moving and can get some wind blowing over your body. A full length front zipper complements the mesh construction. In the heat of summer, there's nothing we like more for massive (and often necessary) ventilation.

The Castelli Ultraleggera Full Zip Short Sleeve Jersey comes in five sizes from Small to XX-Large and in three colors -- Black/white, Red/white, and White/red. It has three traditional rear patch pockets on the back, with the Castelli Scorpion logo in the center.

  • Three rear pockets hold supplies
  • Open the full-length front zipper to cool yourself off when you're ascending the the pass
  • Body-hugging fit won't interfere with your aerodynamics on the descent

Tech Specs

3 rear
SGO.6 (mesh, polypropylene)
Recommended Use:
Manufacturer Warranty:
30 days

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Here's what others have to say...


Sent it back.

    So thin it's lewd. Tried the white. It is see through, just kind of strange.


    Extremely Lightweight

      Great for the very hottest of days but maybe not the best choice for days that start off cool and get hot in the afternoon. The wind goes right thru it. It's almost like not wearing a jersey at all so don't expect much in terms of sun protection either.This jersey is completely see thru, especially the white version. The material is so light that if you load your rear pockets it does cause it to stretch and sag a bit in back, despite their claims. By far the lightest and coolest jersey I own, but almost too much so. Jury is still out on this one...

      Extremely Lightweight

      Castelli Ultraleggera jersey

      Castelli Ultraleggera jersey

      Great Jersey, super ultra hyper lightweight and comfortable. Exchanged for 2 sizes up, other than that, it is great. I have bought 2 and they will be perfect for summer time in hotlanta. Safe riding!

      What size fit you? I'm 6' 1", 165 lbs.

      SPF rating for this fabric?

      SPF rating for this fabric?

      The Ultraleggera jersey is so lightweight it provides almost no UV protection. You're best to apply sunscreen with this jersey.

      The Ultraleggera jersey is so lightweight it provides almost no UV protection. You're best to apply sunscreen with this jersey.