Castelli Women's Perfetto 4 Jacket At the heart of the Castelli Women's Perfetto 4 Jacket is the exclusive 219g Polartec AirCore fabric, featuring a revolutionary PFAS-free electrospun, semi-air-permeable membrane that delivers industry-leading breathability while shielding you from wind, road spray and light rain. The updated fabric provides enhanced warmth when compared to previous generations, making it perfect for cool-weather riding, while retaining the stretch and comfort needed for long days in the saddle. Unlike traditional cycling jackets that can feel restrictive during hard efforts, the Polartec AirCore technology actively works with your body's output, helping regulate temperature and maintain comfort as your intensity increases. Performance details Every detail of the Perfetto 4 has been refined to enhance performance on the road. Chameleon-taped shoulder seams provide additional protection from rain while giving the jacket its distinctive modern appearance. Meanwhile, the covered two-way YKK® Vislon® zip allows easy ventilation and access when conditions change. Three rear pockets with drainage holes, inspired by Castelli's iconic Gabba heritage, offer practical storage and improved functionality in wet weather. A longer drop tail with reflective detailing helps protect against wheel spray and boosts visibility in low-light conditions. Combining weather protection, breathability, comfort and race-inspired performance, the Castelli Perfetto 4 Jacket is the do-it-all cycling jacket serious riders can rely on throughout autumn, winter and spring.