Castelli Idro Pro Jacket review

The Castelli Idro Pro Jacket is a superb, highly technical jacket that comes with a price tag to match

Cycling Weekly Verdict

The technology used in the Castelli Idro Pro is amazing and it's by the far the most waterproof jacket i've used. If you want the best and are willing to pay for it then this is the jacket for you.

Reasons to buy
  • +

    Shakedry technology is amazing

  • +

    Great fit

  • +

    Thicker for hardcore winter use

Reasons to avoid
  • -

    A touch less packable than other jackets

You can trust Cycling Weekly. Our team of experts put in hard miles testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

Gore-Tex's technology has been shaking up the wet-weather jacket scene for some time, and now Castelli has adopted its Shakedry technology into the Castelli Idro Pro Jacket.

Shakedry isn't a Castelli technology, and neither is it new. It was created by leading outdoor brand Gore-Tex a couple of seasons ago and is now being used by the Italian brand for this jacket.

It's a highly technical, hydrophobic piece of kit that truly needs to be seen to be believed! Wet the surface of the jacket and the water beads immediately with seemingly no water absorption at all. Shaking it sees the water fall of the jacket, leaving it bone dry.

Castelli Idro Pro

The jacket has a great fit on the back and shoulders

Science aside, I'm also really impressed with the fit of the jacket, which fits my long arms – unlike a lot of jackets I've worn. The darker material on the chests and the elbows is type of Gore Stretch material, which does a great job of letting the jacket sit close to the body and not flapping in the wind like a lot of packable jackets can. There was also no sagging in the material across the chest or bunching across the shoulders.

The Castelli Idro Pro is better suited to very grim days on the bike as it's thicker than most packable jackets and has a bit of heft to it. When riding on milder rides I did notice it made my jersey underneath damp with sweat.

Watch: Buyer's guide to winter jackets

The thickness also makes it harder to pack down and while it does still fit into a rear pocket it occupies more space than other packable jackets. This size partnered with a stiff zip also makes the jacket tough to take off while still riding.

The jacket is finished with two rear pockets so you don't have to scrabble around for your valuables, although it does leave them more open to the elements.

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