Our Cosmic Pro Wind LS Jersey keeps you fast and light like a jersey, and protected like a jacket. Worn over a base layer, it’s made for spring and autumn riding. The wind protection comes from the feather light 2.5-layer membrane on the front, which offers eight times the wind resistance of a traditional membrane without reducing the breathability. While Lycra panels on the sides provide freedom of movement in a close fit with no fabric flapping (these panels also match the panels in our base layers, for breathability through both). The technical details include a fleece-lined collar that’s higher on the front and lower at the back to match a more aggressive riding position. Ergo cuffs grip your arms. And a stay-down zipper and three ergonomic back pockets keep you tight and organized as you ride.