When you need a lightweight wind vest that will effectively block cool air and light precipitation when you need it. The material allows you to maintain some core body heat. The Cervelo Gilet features a full length zipper, and a stretch fit that is ideal for a close fit overall in an assertive riding posture. A pro-style rear 3-pocket structure will carry your necessities when you plan to use the vest for the duration of the ride, but if you intend to carry it for possible adverse conditions on you ride, the vest compresses for easy jersey pocket carry.