The Castelli Women's Alpha ROS jersey is its most technical one to date and fills in right between a light jacket and a warm jersey. The ROS (Rain or Shine) excels in both cold and dry or wet and cool conditions with Windstopper fabric material on the front and sleeves and Nano Flex Xtra Dry back for extra breathability. This jersey's strongest suit is keeping you warm ye dry, and the ability to regulate temps. The Alpha double-layer construction front helps you manage ventilation and lets this piece go from mild conditions down to cooler temperatures.
A ProSecco Strada inner liner with a 2nd zipper works to remove sweat and prevents you from getting wet and chilled from the inside. The outer benefits from new exterior fabrics designed to increase protection from the rain. A reduction of seams and minimally sealing them, maximizes breathability of the outer layer and prevents heat buildup leading to excessive sweating. While it's not guaranteed to keep you as dry as an all-out rain jacket, the promise is this is the best garment to keep you warm and dry in the widest range of conditions.
Advanced patterning of the material allows for an excellent close-to-body fit, and the extra stretch at the waist keeps the fit sleek while a raw-edge waist lies flat and moves with you. A Castelli silicone text gripper at the waist keeps that jersey from riding up and three rear pockets, with reflective laser-cut drain holes plus a front zippered pocket, carry everything you will need for a big day on the bike.
Castelli calls this a jersey, but we think it's more than that. Perfect for intense rides in wet or variable weather conditions on cool days and if you need additional warmth and breathability on windy rides, the Alpha ROS jersey offers protection that strikes just the right balance to keep you dry and comfy all day.
- Versatile jersey in mild to cool and wet or dry conditions
- Slim fit perfect for group rides
- Highly breathable fabric prevents overheating
- Reflective accents on pockets improve your visibility
- Three rear pockets stash ride snacks
- Item #CST00JG