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Castelli launches super-lightweight Idro waterproof

New jacket said to weigh a crazily light 123g

Castelli is launching a new Idro waterproof jacket that weighs just 123g and packs down super-small for stowage.

The idea is that it’ll go more or less unnoticed in a jersey pocket until you need proper protection from the rain

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“The Gore-Tex Active technology with a new permanent beading surface is an innovative fabric construction that eliminates the textile on the outer face of the fabric, resulting in a two layer fabric that is lighter weight and doesn’t absorb moisture on the outer face,” says Castelli.

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As well as being waterproof, Gore-Tex Active products are designed to be extremely breathable.

Check out our jackets reviews here.

The Idro – it translates as hydro – comes in a close cut, designed to avoid billowing, and it boasts a waterproof YKK zip, elastic bindings on the cuffs and hem, and a zipped opening at the back for ventilation and to allow you access to jersey pockets. 

Castelli Idro jacket  - 1.jpg

Castelli claims a weight of just 123g for a large size and it says that the jacket takes up half a jersey pocket when folded down. That’s seriously lightweight. The Pearl Izumi Elite WxB jacket that we reviewed recently, for comparison, was 211g. 

It’s priced £230.

Mat has been in cycling media since 1996, on titles including BikeRadar, Total Bike, Total Mountain Bike, What Mountain Bike and Mountain Biking UK, and he has been editor of 220 Triathlon and Cycling Plus. Mat has been technical editor for over a decade, 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. He has won his category in Ironman UK 70.3 and finished on the podium in both marathons he has run. Mat is a Cambridge graduate who did a post-grad in magazine journalism, and he is a winner of the Cycling Media Award for Specialist Online Writer. Now over 50, he's riding road and gravel bikes most days for fun and fitness rather than training for competitions.

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