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Castelli Radiation 1-2-3 Jacket

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Item # CST0438

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Item # CST0438


Convertible clothing—zip-on sleeves and pant legs—tends to be the hallmark of the Yank abroad. It’s a look that’s so long on utility that it short shrifts style. The Castelli Radiation 1-2-3 Jacket is a rare winter jacket that is more than the sum of its parts.

Imagine a jacket so flexible that it will keep you warm on a ride that starts early on a morning cold enough for frost and yet offers enough flexibility that it won’t bake you if temperatures creep into the 60s. This jacket is designed for the cyclist who refuses to stay in just because conditions might change noticeably -- or even radically.

Fundamentally, the Radiation 1-2-3 Jacket is a winter jacket. As part of Castelli’s Rosso Corsa collection it gets the very best in materials, design and fit. What makes it so amazing is how easily it adapts to changing conditions. The sleevesCastelli Radiation 1-2-3 Jacket Detail zip off without leaving behind big flapping hems, making it a practical vest. It also includes a zip-on hood for occasions when a cycling cap under your helmet is a flyswatter to a bear. And while those three variations on a single garment are great, this jacket has a secret weapon—its Radiation inserts.

The Radiation inserts are made from breathable aluminum and they insulate by reflecting back as much as 80 percent of your body’s own heat. Instead of the bulk that comes from fleece, the Radiation inserts allow the jacket to follow your body’s contours more closely, keeping you more comfortable.

With four pockets, the Radiation 1-2-3 Jacket has more than enough stowage capacity to carry the sleeves, hood, and Radiation inserts and still allow you pack your cell phone and an energy bar.

The Castelli Radiation 1-2-3 Jacket is available in Black/black and White/black and comes in six sizes from Small through XXX-Large.

Tech Specs

front vents
[shell] WindStopper X-Lite (100% polyester), [lining] Radiation heat-reflecting fabric
Recommended Use:
cold-weather cycling
Manufacturer Warranty:
30 days

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Here's what others have to say...



    Lots of odd feedback here. Bottom line- clever, techy, works. Like so much in this line, high-end smart controls. This one works. Made in Romania. 6ft, 180, size XL.

    Unanswered Question

    How great is the water resistance?

    How great is the water resistance?

    Unanswered Question

    How great is the water resistance?

    How great is the water resistance?

    Castelli Radiation 1-2-3 Jacket

    This three-season jacket sits comfortably against the body thanks to Windstopper® X-Lite fabric, which is lightweight, has minimal bulk and has unprecedented stretch to move with you like never before. Most importantly, the snap-in Radiation inserts allow this jacket to adapt to a broad range of weather conditions. Now you can have three-season comfort with one jacket, from mild to ice-cold and windy days.


    Castelli lining after two uses


    seriously folks, start calling BS on these companies. Across the board, no matter what you're buying, there is the same shoddy quality being passed off onto consumers. Seriously ask yourself if Castelli in this case was unaware of the durability here. If you say yes, then you've drank the kool-aid. This is becoming more and more common, which points to a downward slide in terms of the ethics of these companies. High price does not equal high quality these days in no way shape or form. It more often than not means you are an R and D volunteer, who has the luxury of paying a premium to help save some over stuffed and overpriced company the time and money of makiung sure their stuff is up to snuff before it is sold to the public.

    Tell these companies to F off.

    and it's probably made in China or India to boot.

    totally agree with you guys. We are slaves of Caps

    Unanswered Question

    Does the back ride up at waist?

    Does the back ride up at waist?

    Curious about the changes between the 2009...

    Curious about the changes between the 2009 Insolito & the 2010 1-2-3 jacket. How do they affect the performance of the jacket? Is less radiation liner better for breathability? Is it still plenty warm in freezing temps without sleeve liners? What other major differences are there?

    The Shell of the new 1-2-3 is virtually the same as before all the changes took place with the Liner. It is maid of the same material but done in removable panels, 2 in the front and 1 large panel in the back. This leaves the sides and arms with now radiation protection. This version is not as warm as the previous version but most of the feed back said the previous version was to warm.

    Write your answer here...
    I dunno, But I LOVE the 2009 Insolito. I would look on ebay till I found one if I needed a GREAT cold weather cycling jacket