An extremely light and packable wind shell that fits close to body, with stretch breathability panels, allowing you extend the temperature range of your favorite Castelli pieces.

• Ultralight windproof woven microfiber front and back
• Striped mesh fabric at sides and back of sleeves is stretchy to prevent fabric flapping in wind
• Folds up extremely small
• Integrated stuff sack
• YKK® Vislon® top- and bottom-opening zipper
• Reflective Castelli logos