Castelli Prologo 4 jersey – review

Aimed as a lightweight jersey for summer days, Castelli’s Prologo 4 jersey might require a bit of layering up during spring or cooler days, but when the temperatures top 20 degrees it becomes a really valuable piece of kit.

The fourth iteration of Castelli’s Prologo jersey is 98 per cent polyester and two per cent spandex forming a dual layer construction designed to actively move moisture away for the skin. Wicking is a very important attribute for a summer jersey, and it’s pointless having a base layer that moves moisture away from your skin ultra efficiently if your jersey isn’t similarly efficient. Plus, when it gets really hot you might be tempted to do away with the base layer altogether, and the jersey becomes your last line of defence between you and a torrent forming on your torso. Apologies for that image.

Castelli call the fabric treatment that enables the moisture transfer ‘Prosecco 3D’, which is just about the most Italian thing ever. Outside of amusing cultural clichés, though, the Prosecco fabric is very smart and basically disperses water droplets that come into contact with it, spreading them over a larger area so that they evaporate quicker. Told you it was smart.

The inside layer is mesh, although on the sides and under the arms the dual layer is done away with and replaced by just mesh. It adds a bit of stretch too, which helps to improve fit as well as making it more comfortable to move about, especially when you’re out of the saddle.

The sleeves fit well, and the stretchy material means that you can easily fit a short sleeve baselayer and arm warmers underneath – very useful if you want to use the jersey on a cooler day when the excellent breathability might not be your ally.

At the back, the grippers on the bottom of the jersey may look unsubstantial but they do the job exceptionally well, part of that likely being due to the fact that they surround the hem rather than just sitting under the pockets. Speaking of which, the three rear pockets are reasonably roomy and the end two are slightly (and we mean slightly) cut at an angle which, in use, didn’t make a whole lot of difference, but the pockets are sensibly situated on the jersey which makes the easy to access anyway.

The right hand pocket has a zip pocket integrated into it, and the pocket flap is reflective with Castelli’s mantra ‘you know you’re getting an unfair advantage’ written on, which is a nice touch. Zip pockets might not be a deal breaker when it comes to jerseys, but they’re always useful and a great way to not lose your keys/cash when you’re out on a ride.

Coming in the Azzurri blue, the Prologo 4 jersey really gives a flavour of Castelli’s Italian roots, but if the blue look isn’t for you then there’s six other colours to choose from including maroon and green which you don’t see very often. There isn’t matching pair of shorts, but the schemes used in the jersey are mirrored closely in the Evoluzione, Volo and Velocissimo Due bib shorts so you can match up easily if you want to. It’s also pretty low on the logos for anyone who prefers to not feel like a rolling billboard.


The Prologo 4 jersey is a high quality, comparatively low priced piece from Castelli. The great thing these days is that you don’t have to pay premium prices for premium kit and although £75 might seem a lot, this is a jersey which will get plenty of use through summer.


– Good looks and an abundance of colour choices
– Excellent fit
– Highly breathable


– Excellent breathability means it’s best saved for hot days, unless as an additional layer

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