A little bit of cool weather riding never hurt anyone, especially when you have the Castelli Women’s Mortirolo 2 Jacket on your side. Built for mild, yet cold conditions that fall above the 42 degrees Fahrenheit mark (sans precipitation, mind you), the Mortirolo is endowed with a hybrid design, ensuring that you get the best of both worlds: windproof protection and innate breathability. To start, Castelli designers outfitted with Mortirolo with a warm and windproof Gore Windstopper X-Fast material at the front of the jacket, sleeves, and yoke. This strategic material placement assures protection where you need it most and safeguards your vital organs from warmth-sapping winds and elements. Meanwhile, the back end of the jacket features Warmer thermal fleece that is designed to wick moisture, dry quickly, and promote passive breathability. The slim fit maintains an aerodynamic feel, without squeezing you uncomfortably, and reflective strips enhance your visibility in low-light conditions.