The Castelli Alpha RoS 2 jacket is Castelli's best jacket for mild weather. Water repellent, with windproof front protection, light insulation, maximum breathability. It will keep you dry in fog, light rain or on wet roads. It is a Castelli favorite because of its comfortable fit and versatility, as it can be worn in a wide range of temperatures.
Wind protection is provided by our lightweight, bi-stretchy GORE-TEX INFINIUM ™ WINDSTOPPER® fabric that follows you around, yet is so light you'll barely notice you're wearing it. This lightweight windproof layer is lined with a separate ProSecco Strada inner layer, with a zipper that can be opened independently for perfect ventilation control. The back is made of our Nano Flex Xtra Dry fabric that offers a good level of insulation without a membrane, allowing large amounts of sweat to drain away. The close fit avoids flapping fabrics and small details really make a difference: easy on/off YKK® zippers, reflective drainage holes on the pockets, flat silicone waistband.
- GORE-TEX INFINIUM ™ WINDSTOPPER® 150 fabric on the front and sleeves that provides wind protection, high breathability and effective rain protection.
- Nano Flex Xtra Dry on the back for added ventilation and to let heat and perspiration escape while wicking away rain with a nanotechnology-based water-repellent finish.
- Double-layer Alpha construction separates the windproof layer from the insulating layer, allowing for better ventilation management.
- ProSecco Strada inner layer for lightweight insulation with effective moisture management.
- Double YKK® Vislon® front zipper.
- Front zippered pocket.
- 3 back pockets with laser-cut reflective drainage holes.
- Raw edge waistband sits flat and follows you wherever you go.
- 7°-15°C / 45°-59°F
- Weight: 421 g
Take advantage of our expertise
Unsure about the right product? Our experts are here to guide you. Whether in-store or online, we take the time to answer your questions so you can be confident in your choice.
Talk to an expert
