Back Back


Castelli Cycling Logo

Castelli Idro Women's Jacket


The Castelli Idro W Waterproof Jacket is a ladies specific lightweight cycling jacket made of the revolutionary GoreTex SHAKEDRY fabric... Read more


*Couriers may have slight delays due to COVID-19. View our latest status updates.
SKU: CS180490101


The Castelli Idro W Waterproof Jacket is a ladies specific lightweight cycling jacket made of the revolutionary GoreTex SHAKEDRY fabric.

Shakedry is a 2 layer laminate but unlike all other waterproof laminate, the waterproof bit is on the outside not in the middle. This results in water just running off (like a freshly waxed car) and it keeps running off, ride after ride, after ride, forever. (all other waterproofs rely on a DWR coating to achieve runoff and this wears in time)

In practice, this tech means you get an ultralight fully waterproof cycling jacket with exceptional breathability that packs up to the size of a satsuma and never needs reproofing.

The Idro W comes with all the features you would expect from a compact fully waterproof jacket - so you get a waterproof easy slide YKK zipper fully taped seams a dropped tail and long arms. The cut is quite snug so it doesn't flap about on the descents so choose your normal jersey size for summer use - If you intend wearing this over bulky winter clothing consider sizing up.

Key Features
  • Castelli's first ladies jacket to feature Gore-Tex® Active SHAKEDRY technology with a new permanent beading surface
  • Guaranteed to keep you dry
  • Minimalist construction is ultralight (89g) and ultra packable, never leave it behind
  • Fully taped seams
  • Easy-sliding waterproof YKK® Vislon® zipper
  • New Anatomic wrist closure
  • Reflective Castelli Wordmark
  • Weight 89g (Size S)
  • Size women's XS-XL
  • Castelli comfort range 6˚-20˚C

ABOUT Castelli

Castelli Cycling is the most innovative, stylish and prestigious cycling clothier in the world. Decades of pro cycling development and a passion for perfection in materials, cut and performance has seen the brand reinvent cycle wear time after time. From the first Lycra shorts to sublimated printing, the game-changing Gabba and aerodynamic apparel, Castelli continues to set a path that others can only follow while maintaining generations of Italian heritage. Read more about Castelli.


Founded by real cycling enthusiasts in 2004, our passion for elite performance runs through everything we do at Saddleback. Our team of dedicated roadies, mountain bikers and triathletes practice what we preach to bring you the finest cycling products and a superior service to match. We're the official UK home of Castelli, Chris King, ENVE, HJC, Moots Cycles, PUSH, Sidi, Silca, Sportful, Stages, Troy Lee Designs and Wolf Tooth.


We use a third-party reviews system, Yotpo, which allows you to leave a review for products you’ve purchased from us. You will find the reviews form under the ‘Reviews’ tab on each product page.

Personal data collected:

  • Name
  • Email address

Where this data is stored:

This data is stored securely in an encrypted third-party service provided by our reviews system, Yotpo.

What we use this data for:

This data is used to verify your purchase of the product you’re reviewing and to publish the review on our website. The name under which the review appears can be anonymised at your discretion. The review itself may also be used for marketing purposes.

How long we keep this data:

This data will be kept as long as the review is visible on the website.

How to opt-out:

If you wish us to remove your data from our systems, please contact and we will be happy to help.

Read our full privacy policy.