Giro's Wind Guard 14 Zip Jersey may be the only piece of kit that is appropriate for any cool weather activity. Though its anti wind elements recommend it for cycling where you're creating your own, personal wind chill effect it's lightweight enough to use alone for any cross training or casual social function in cool conditions. The Wind Guard's primary identity is as an anti wind jersey. The wind blocking panels in the front and on the shoulders mean that less cold gets to your body, so less insulation is needed, so the jersey's overall weight and bulk can be drastically reduced. This means it can serve as a base or outer layer for when the temperature and conditions demand a bit more protection. The rest of the jersey is made with Polartec fabric, which is as gentle on your skin as the jersey's wind blocking panels are hard on the elements. The brushed lining means it insulates well beyond what you'd expect from such a light material. It also wicks moisture from your skin, so gains in comfort made through the jersey's wind blocking and insulating aren't lost to mid workout clamminess. The Wind Guard's high collar and thumb holes ensure complete coverage. The jersey's simple, understated aesthetics also mean that it's equally at home when paired with Lycra shorts or jeans.