Using their Torrent Stretch fabrics, Castelli have created a lightweight waterproof jacket that fits closely to minimise flapping and thus help reduce drag. The result of the aero fit is you'll save some energy, particularly useful when racing or training hard. The Torrent Stretch 3-layer fabric also slides well over bare arms making getting the jacket on and off far easier when you're moving. Features such as the Gabba-style drop tail and sealed seams ensure you're fully protected, while a full-length YKK® Vislon® zipper allows easy control of airflow. Read more… A tall collar provides the final seal against the elements. With three rear pockets you can also carry extra kit, without having to dig into a jersey pocket. This is the perfect rain jacket for fast riding in foul conditions thanks to the aero fit paired to a fully waterproof and windproof construction .