ALPHA FLIGHT ROS JACKET
Castelli's best jacket for mild conditions. This lightweight, super-breathable, and extremely fast jacket is great for high-intensity rides or staying at the right temperature in cool conditions. Alpha construction with membraneless outer layer and Polartec® Alpha inner insulation.
$319.99
Color: SULPHUR/NICKEL GRAY-DARK GRAY
|4523506-776
Product features
- Nano Flex Light woven fabric on chest, sleeves, and upper back partially blocks wind, but lack of a membrane guarantees maximum breathability
- Alpha double-layer construction separates wind-block layer from insulation layer, allowing better ventilation and temperature management
- Water-repellent finish
- Polartec® Alpha active insulation on chest, sleeves, and back for extra warmth
- Nano Flex Extra Dry on back for more ventilation, allowing heat and sweat to escape while shedding rain thanks to a nanotechnology water-repellent finish
- Off-set Double YKK® Vislon® front zippers
- Zipper pocket on side to secure valuables
- 3 rear pockets with laser-cut drain holes
- Raw-edge waist lies flat and moves with you
- Nano Flex Light woven fabric on chest, sleeves, and upper back partially blocks wind, but lack of a membrane guarantees maximum breathability
- Alpha double-layer construction separates wind-block layer from insulation layer, allowing better ventilation and temperature management
- Water-repellent finish
- Polartec® Alpha active insulation on chest, sleeves, and back for extra warmth
- Nano Flex Extra Dry on back for more ventilation, allowing heat and sweat to escape while shedding rain thanks to a nanotechnology water-repellent finish
- Off-set Double YKK® Vislon® front zippers
- Zipper pocket on side to secure valuables
- 3 rear pockets with laser-cut drain holes
- Raw-edge waist lies flat and moves with you
Technical Features
- Temperature:6°C - 16°C / 42°F - 61°F
What It Is


Exclusively engineered by Castelli. We take our thermal fleecy stretch Thermoflex fabric and coat it with millions of tiny nanofilaments to create the most water-repellent fabric finish ever. Drops of water stay as spherical balls on top of the fabric or bounce off the fabric without leaving a trace.

We’ve engineered RoS as the no-compromise best clothing we know how to make for dry conditions, and then tried to make it as close to waterproof as possible without sacrificing breathability and ventilation.

Our Rosso Corsa label is only applied to the highest-level products we make. Every thread and fiber, every curve and contour is obsessed about. Rosso Corsa represents a categorical breakthrough in cycling innovation and the meticulous craftsmanship you expect from Castelli’s performance-enhancing apparel.