The ROS in the Castelli Alpha ROS Jersey stands for rain or shine. Castelli’s most technical jersey excels in both wet and dry conditions thanks to a combination of high tech fabrics. The Strada inner liner with 2nd front zip creates an extra layer that ventilates air to keep a cyclist dry and to ensure he does not overheat when the ride intensity maximizes. The Windstopper® 150 LRR in the front and sleeves is the lightest Gore® Windstopper fabric made of a three-layer knit fabric that has total windproofness, and exceptional breathability. The DWR coating is been added to repel water. On the back, the Nano Flex Xtra Dry is made of a fleecy stretch Thermoflex fabric coated with the most water-repellent finish ever. The Thermoflex keeps a cyclist warm while the coating creates a surface where water bounces off the fabric without a trace. The fabrics are put together with reduced seams for extra comfort. Castelli added the Waterproof YKK® Vislon® zipper. All these features are combined to offer a cycling top that protects a cyclist in light rain while still having enough breathability to provide comfort in cool, sunny weather. Besides comfort in rain or shine, the long sleeves jersey has a race fit pattern so when leaned over in the cycling position, air flows over efficiently. The top is made for the racer who needs to be aero. Other features have been added to ensure a comfortable race fit. The waist lies flat and moves with a shifting body and Castelli’s silicone gripper at waist keeps the jersey from riding up. The articulated collar keeps out rain and cool weather while maintaining contact with the skin without any chafing. The collar feels very soft against the skin. While the long sleeve jersey has the traditional 3 rear pockets for storage, a front zippered pocket provides a secure location to store keys or money when it’s wet outside.
