Castelli Women's Perfetto RoS 3 Jacket A revolutionary cycling jacket that can do it all in all weathers. The Castelli Women's Perfetto RoS 3 Jacket is windproof and yet incredibly breathable. Essentially waterproof but free of harmful PFAS. It's the biggest leap forward in all-around cycling weather protection since the original Gabba. And it's made possible thanks to the development of an exclusive 150 g Polartec® AirCore™ electrospun air-permeable membrane. Breathe easy with Polartec® AirCore™ With its Polartec® AirCore™ construction, the Perfetto RoS 3 is significantly more breathable...