Pearl Izumi takes wind jacket design to the next level with their P.R.O. Aero Jacket. It's made from their stretchy P.R.O. Barrier Stretch fabric that protects you from wind and water without flapping like a sail as you cruise down the road. Other features include Direct-Vent ventilation panels, contoured sleeves, a high collar and reflective accents for safety. And, it fits nicely in a jersey pocket when the mercury begins to rise.