Castelli Alpha ROS 2 Jacket

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Alpha ROS 2 Jacket
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Product ID: 1261579

Castelli Alpha ROS 2 Jacket

The ultimate winter cycling garment, Castelli's Alpha ROS 2 Jacket is packed with technology, utilising the most advanced fabrics to provide protection even when the temperature plummets below zero, in both wet and dry conditions. 

This garment tackles the issue of breathability in such a protective outer layer by utilising a double-layered construction. The outer Gore-Tex Infinium™ Windstopper® 150 shell can be opened without compromising the inner insulation layer, resulting in effective moisture transfer from the inside to the outside. Zip up when you hit a fast descent and you'll be dry and warm. The minimal seams are sealed, there's a raw edge to the waistband, and a double-layer cuff, all creating further barriers against the elements. 

The fit is close and racy without restricting movement thanks to plenty of stretch in the materials, and the back features excellent ventilation so air is allowed to escape. Finished with three rear pockets and a zippered side pocket, there's plenty of space for all your ride essentials and more valuable items. 


  • Rain or Shine (RoS) engineering
  • Gore-Tex Infinium™ Windstopper® 150 fabric for wind protection with high breathability and effective rain protection
  • Reduced seaming with seam sealing on shoulders reduces chances for water to enter through stitching
  • Double-layer Alpha construction separates the insulating layer from wind/water barrier to let you better regulate ventilation
  • Water-resistant YKK® Vislon® zipper slides easily for better regulation of airflow
  • Raw-edge waist with silicone gripper lies flat and seals out wind
  • Double-layer cuff integrates with a glove to prevent cold wind or water from entering at the wrist
  • Stretch fabrics with advanced patterning make for an excellent close-to-body fit that still accommodates a wide range of body types
  • Back ventilation
  • Three rear pockets with reflective laser-cut drain holes
  • Zippered secure side pocket for valuables
  • Recommended temperature range: -5°-10°C / 23°-50°F
  • Manufacturer claimed weight: 525 grams (size large)

Castelli Alpha ROS 2 Jacket Sizing

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