In creating the Women’s Alpha ROS Jacket, Castelli literally and figuratively set new standards. Internally, Castelli established a new measurement of “real-world waterproof” that will likely influence others in the cycling industry to reexamine certain hackneyed or impracticable standards. We all know that total waterproofness in a cycling jacket isn’t possible if you also want proper fit, comfort, breathability, and warmth. Instead of creating yet another totally waterproof jacket that has the fit and breathability of a trash bag, Castelli decided to set a new standard for waterproof - “real-world waterproof” - nearly impenetrable to water, breathable, insulated, close-fitting, and comfortable, and the Women’s Alpha ROS Jacket is its successor.
Castelli kept several elements of their original Alpha Jacket - soft and stretchy fabrics, snug fit, high breathability, and two-layer construction. The outer features DWR-treated Gore® Windstopper® fabric - totally windproof yet breathable and water resistant. The inner layer is made from a soft, insulating fabric that is comfortable against the skin and warm. To achieve the highest level of waterproof possible without compromising comfort and usability, Castelli substantially reduced seaming, strategically placing them where they’re less vulnerable to water, and finally, fortified the seams by double stitching and sealing. A waterproof YKK® Vislon® zipper helps provides another line of defense against the elements.
For a cozy and close - but not restrictive - fit, the Alpha ROS Jacket features a raw-edge waist that lays flat yet moves with the body. Raw-edge cuffs stay flush against the wrist and effortlessly converge with gloves. Anatomic patterning combined with supple fabrics ensure a snug fit for a wider range of body types and sizes.
Features & Specs:
Gore® Windstopper® 150 outer shell.
Soft, insulating inner layer.
Nearly impenetrable to water.
Moisture wicking and ventilated.
Reduced seaming & seam sealing.
Waterproof YKK® Vislon® zipper.
Raw-edge cuffs and waist.
Stretch and anatomic design yield snug yet accommodating fit.
Three rear elasticized pockets with reflective laser-cut drain holes.
Approx. Weight: 399g.
Castelli’s Rating System: