The Castelli Fly Limited Edition Vest offers lightweight protection in mildly cold conditions with its Castelli FFT construction, GORE-TEX INFINIUM WINDSTOPPER lining, and CLIMA SL insulation. The FLY SL shell boasts optimal protection against wind and rain, while the minimal collar helps keep our body temperature at a perfect spot. With four total pockets, reflectivity at the waist, and a two-way zipper, this vest is a must-have for our transition riding wardrobe.