The Castelli Perfetto Light Jersey is ideally suited to cool temperatures, especially when it's dry or there's a risk of light rain, and its highly breathable design won't overheat, no matter how hard you ride. Gore Windstopper 150 fabric on the front, sleeves and yoke provides lightweight wind protection and repels water. Nano Light fabric on back also sheds water and allows the body to breathe. Full YKK Vislon zipper regulates core temperature and is easy to open and close. Drop tail hem offers protection from the elements and stays in place, thanks to the silicone gripper waistband. Reflective trim increases visibility in low light or fog and three back pockets carry nutrition, spare tubes and other essentials.