Even if its a warm day, a long descent or a windy stretch of road can suck the heat from your core in no time. Mavic's Cosmic Pro Women's Cycling Jacket cuts the wind without slowing you down, packs away into its own pocket for easy transport, and weighs a miniscule 80 grams, so you can always be prepared for windy, heat sucking conditions. The Cosmic Pro is made from two fabrics, Wind SL and Ride Wick ST. Wind SL, which makes up the body of the jacket, is a lightweight nylon that's designed to shed wind, while Ride Wick ST is a light, stretchy, and ventilated polyester that's used in the side and back panels to increase breathability and flexibility. They'll also shed light rain, and they help the Cosmic maintain a minimalist feel that's essential for riders looking to cut grams without giving up protection. When the Cosmic isn't packed into its rear pocket, you can use the pocket to store a bottle or energy gel. The asymmetrical zipper prevents chin irritation and locks in place to let you ventilate during climbs, and the elastic cuffs and hem help you keep a sleek and aerodynamic profile while the dropped back hem provides plenty of coverage when you're stretched over the bars.