Castelli's Giro Jersey is a solid offering for autumn/spring, and you'll get plenty of use from it as part of a layering system in the heart of the winter.
You couldn't call the Giro an especially innovative jersey compared to a lot of Castelli's designs, but you need a few staples in your wardrobe to do the basics well.
It's made from what Castelli call 'Warmer' fabric, which is a fleecy polyester. It's fairly similar to a winter tights fabric, combining a reasonable amount of warmth with good breathability. It's more stretchy widthwise than it is lengthwise so you can get a close fit without the rear pockets sinking down around your butt when you have them filled with all your winter provisions.
The chunky zip is easy to adjust for temperature control and the collar is high enough to stop the cold air coming in around your neck. An elastic gripper keeps the waist in, a couple of reflective tabs at the back improve visibility just a touch, and the logos won't come off in the wash because they're all printed or sewn on.
The cut is slim but there's enough stretch here that you get quite a bit of leeway when it comes to fit.
Castelli give a temperature range for the Giro of 14°C to 20°C. I'd say that's high unless you're going without a base layer. With a base layer underneath, I'd say it's more suited to 11-17°C or something like that. Plus, you can always sling a second thin top underneath when the weather is colder, or put a gilet or windproof over the top, and extend its use right into winter.
Warm, breathable midweight jersey for a variety of off-season temperatures.
road.cc test report
Make and model: Castelli Giro Jersey FZ
Size tested: Large, Black/White, 2 sent
Tell us what the product is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?
This is Castelli's write-up:
The Giro long-sleeve jersey will keep you warm and dry during autumn and spring rides. Constructed using our fleecy Warmer fabric with a smooth surface on the outside that offers exceptional warmth and wicking.
This jersey has all the details: there's an elastic gripper around the back of the waist to keep the jersey from riding up, a YKK camlock zipper that's easy to open and close for ventilation, and three rear pockets that are big enough to hold spare tubes, gloves and food without bouncing. Two rear reflective tabs offer increased visibility in low-light conditions.
- Warmer fabric for excellent warmth and wicking
- Silicone gripper on back keeps jersey from riding up
- Sublimated logo on chest
- Full-length YKK camlock zipper
- 3 Rear pockets
- Rear reflective tabs add visibility
Tell us how the product performed overall when used for its designed purpose
There are no features that really stand out but everything is done well throughout.
Did you enjoy using the product? Yes.
Would you consider buying the product? Yes.
Would you recommend the product to a friend? Yes.
Anything further to say about the product in conclusion?
I wouldn't say this is Castelli's strongest product in that many brands do something similar, but it's a good, solid midweight jersey.
About the tester
Age: 43 Height: 190cm Weight: 75kg
I usually ride: My best bike is:
I've been riding for: Over 20 years I ride: Most days I would class myself as: Expert
I regularly do the following types of riding: commuting, club rides, sportives, general fitness riding,
Mat has worked for more bike magazines than anyone else in the known universe, dating back to a time when this was all just fields. He's been road.cc technical editor for four years, testing bikes, fettling the latest kit, and trying out the most up-to-the-minute clothing. We send him off around the world to get all the news from launches and shows too. When he's not cycling around Wiltshire, he's running around it, or possibly swimming (sadly, he's one of those 'triathletes'). Mat is a youthful 42-year-old Cambridge graduate, GSOH etc.