The ultimate Gore-Tex cycling jacketLight, packable, highly breathable, durably waterproof and aero fitting. The Castelli Idro Pro Jacket is the first piece that brings all though features together into a jacket made for the rider who has to (or choses to) ride in any weather conditions. When Gore-Tex introduced Shakedry technology two season ago, Castelli immediately saw the opportunity to make waterproof jackets lighter than ever. And then they tested it and realized that they’re also able to make them more breathable than ever. Now, thanks to Gore’s new Topo inserts and the Gore/YKK integrated zipper, they’re able to bring a close fit and extreme packability to a jacket that’s fully protective for all-day riding in the rain. Castelli have given it two external pockets so you don’t have to unzip to reach your jersey pockets. They’ve given it a longer tail to shield you from the spray coming off your back wheel. They’ve given it a soft neck liner. And they’ve given it reflectivity for safety. Compared to the Idro 2 jacket, this is more of a workhorse jacket. It’s made for the rider who leaves his house for an all-day right in the rain, for the rider whose jacket is a necessity and not a piece that stays in a pocket until it’s needed.