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      Note: This item is a Sales Product Sample, new with tags. We encourage you to use our official sizing charts above to determine if this product will fit you, but to help in deciding if the fit is right for you, this product will fit a normal women's size 0-4 comfortably for bottoms and a normal women's size XXS-S in tops.  There are no additional sizes available, so please order thoughtfully.



      We call it a light jacket but the comfort range is surprising. It dips well into temperatures where you might normally reach for a full protection jacket, yet the surprising breathability makes it still comfortable in temps when you may have worn arm warmers and a vest in the past. And it keeps you dry.

      RoS stands for Rain or Shine. It’s a label we give our most advanced products that excel in both dry and wet conditions. For dry conditions, you’re looking for comfort along with breathability to prevent you from getting wet and chilled from the inside. But with wet-weather clothing, you’re looking for protection that will help you stay warm by keeping the rain out and letting sweat escape. The Alpha RoS W Light Jacket ticks both of those boxes.

      Both the front and back materials represent a significant step forward in rain protection. These fabrics are used with reduced seaming, and seam sealing where necessary. We call this “functional waterproofing” because while we don’t guarantee that no drop will ever enter the jacket, we promise you that this is our best effort to keep you warm and dry in the widest range of conditions.


      • Lightweight double-layer jacket with significant rain protection
        • Gore® Windstopper® 150 front and sleeves
          • Nano Flex Xtra Dry back for the most significant nonmembrane water protection available
            • ProSecco Strada inner liner with 2nd front zip
              • Waterproof YKK® Vislon® zipper
                • Articulated collar that fits better whether you’re standing or riding
                  • Side zippered pocket
                    • 3 rear pockets with reflective laser-cut drain holes
                      • Raw-edge waist lies flat and moves with you
                        • Advanced patterning makes for excellent close-to-body fit
                          • Castelli silicone text gripper at waist keeps jersey from riding up
                          • Weight: 340g

                            The Castelli Women's Alpha RoS W Light Jacket - Pink is a sensational customer favorite, and we hope you like it just as much.

                            Inventory Last Updated: May 29, 2024
                            SKU A17539-288Sample

                            Castelli Men's Sizing

                            Chest 36-37in 38-39in 39-41in 41-43in 43-45in 45-47in
                            Waist 27-29in 29-31in 31-33in 33-35in 36-38in 38-41in

                            Castelli Women's Sizing

                            Chest 31-33in 33-35in 35-37in 37-39in 39-41in 41-42in
                            Waist 25-26in 27-28in 29-30in 31-32in 33-34in 35in
                            Hips 34-36in 36-38in 38-40in 40-42in 42-44in 44-45in

                            Castelli Shoe Cover Sizing Euro Shoe Sizes

                            Men ----- 36-39 40-42 43-44 45-46 46-48
                            Women 35-37 37-39 39-42 ----- ----- -----

                            Castelli Socks Sizing Euro Shoe Sizes

                            Men's 36-39 40-43 44-47
                            Women's 35-38 39-41 -----

                            Castelli Gloves Sizing

                            Men's 7.1in 7.1-7.9in 7.9-8.7in 8.7-9.4in 9.4-10in 10in
                            Women's 6.3in 6.3-7.1in 7.1-7.9in 7.9-8.7in 8.7in -----

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