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Castelli Idro 3 W Jacket

Castelli Idro 3 W Jacket
  • Color: Black
  • Color: Black
Color: Black
Size: Select size
Please select options Unavailable


This jacket is a game changer. To call it a rain jacket is only touching the surface. While it's an outstanding rain jacket, we end up using it 95% of the time in dry conditions because it's so compact that we always have it in our center pocket, ready to put on for a long, cold descent, or to cover up at a coffee stop, or to keep some heat in while waiting for the other guys to show up for the ride.

We named this jacket Idro 3, which at first doesn't say much, but let's break it down.

Idro is Italian for "hydro," meaning having to do with water. Or in this case, keeping water from coming in while letting sweat escape. It does both very, very well. Best we've ever made.

The 3 in the name indicates this is the third iteration of this product, and we're nearing the maximum of what's possible with a shell jacket. There's a big innovation on the back, with a large high-stretch GORE-TEX panel that allows us to give the jacket a trim fit (i.e., no flapping fabric, so you can just ride away from your riding companions), yet the jacket expands to fit around loaded pockets — or to fit normal people with a bit of a gut. Beyond the stretch panel, we've carefully refined the fit, the finishing construction, the large reflective panels, and especially the wrist closures with a new internal gaiter.

We've made this jacket to be as fully featured as possible when you wear it, but it will spend a lot of time in a pocket on those days when it might rain or when you just need it to cover up on long alpine descents. It weighs less than many jerseys and stashes away to occupy only half a jersey pocket.

There is one drawback: the fabric is so lightweight that it is a little bit fragile, so treat it with care. It'll be one of the most important pieces in your cycling wardrobe.

- The lightest and most packable fully waterproof Castelli GORE-TEX jacket
- GORE-TEX SHAKEDRY™ product technology sheds water yet offers unmatched breathability
- The entire lower back is in GORE-TEX Topo stretch fabric to expand in diameter if you have a few extra winter kilos or full pockets
- Reflective tape on back of both sleeves for high visibility in low-light conditions
- YKK Vislon waterproof zipper slides easily for ventilation adjustments
- Internal wrist gaiter seals wrist and integrates with glove to keep water out

Part Numbers

Option UPC MPN Store SKU
Black / X-Small 08050949398944 B4521551010-1 IDR19601535S
Black / Small 08050949354124 B4521551010-2 IDR18466565S
Black / Medium 08050949398951 B4521551010-3 IDR18501612M
Black / Large 08050949398968 B4521551010-4 IDR18121346L
Black / X-Large 08050949398975 B4521551010-5 IDR19558375L